1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bf8c152d4c0000bc675ea266113c3134c35045dedae760a96a0024f624e024. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f5db0b2-636b-40ff-a647-3563ae8d9ba5.json and https://artists.proofprofile.net/proofs/artist/3f5db0b2-636b-40ff-a647-3563ae8d9ba5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3560e4d99825d022804be876a4383fb10e180f67b4ddb0733400858e30a38499. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366f38882beae412b8334add1da1e353e0cbb1d671a44c5390c816e30a05cc28. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c254ccccebaed716f05eec736065a83b400b37841da13ef5f24c23e7eef4b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e47edbbf73d05ba4243590ed48136a6b7699ba365ee9c9796de55b54920a6aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea348acc0964050e2fc3c589ae4e5ddc4210c5c8d4439cfd0cd2d23542a014ee. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4acb0af5502130911c4d358052bbbba36c5aef990bc83b7f9d1c36ad57de92. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaded7c7515cae604ab3585dd8e2dfdf43cbf732e09806750e0db0fdd0c803ab0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d4f1b9c80b61eba19243b5f7e7914875c3077ca1dbb73544b6e5acc729509. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b7f6d0947629ee029ebc8fad04b1e7616e9b8876bcf51f9c2a6f7820694009. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0db528308f48c5ef3c2fc06ac9fa306f9dc2550e9112712852f87032158a1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c440c71dd996adcb070a51667f3f95e3dc915e9a358820d657a2b5ad0364f9. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a81246fd34297679e1d103fd8f032374118fde26a4ac13ef32b84593dc285. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41758988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ef12124f8548af3ede62b65aa90d361c6289f00764258bd7896da7c7fdf1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f45078838ae1fdae95832c3e607149508b48b8b59bbe9ce3708d806d8ce3d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0de71b352c478725d0cbf5f90df796e1e1f52797d1c8b6bfc272f30380d08b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b2e556a7a067d5f0a0db1883424d76e84debf7547fc1d34d3b6d6c8cc2caa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62672c19eb992a542b336e61f4d0e6ffe19af5d0135b48177df8d4274ff8299b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81e59b0ec7ea90b83a3d24a034bfac5d4eb799fa0116d35695dceba7e96638a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1f0ec36ad704bf2c16a847cad403e4eac37e3c6147807723a43328bdd07b4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9124a4164ef4dc321fb75669d675d5171aea0e71f657b4ad3dd69ba84ba82. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971603837b3b8ac9d8a88fabdc5697fae555c3cc8ee27e4681c8a19b7bb6a78a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495da0aef0799a9fea2804454d13432bf5a9c9b7bd91932dae7d25afed8fcb50. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6487e6066395c9bbf08be2f7bddb60294acbb5ac5a0d8fe9d18ed648f9cd06ce. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59eba2f01a7708107ebbdb73df842711979d8e95887568ff34732cf7a1e8aff9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b79c5d65bb34f214f04bb659615aceeba3969b86f43bfea76ee48d21d93fd76. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1f0ec36ad704bf2c16a847cad403e4eac37e3c6147807723a43328bdd07b4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b32445138f003f350b29a83a953eb723b5d5685289d0ffe35777d02fcd34d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62672c19eb992a542b336e61f4d0e6ffe19af5d0135b48177df8d4274ff8299b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e9ce5bd8b42bb421ec184245bc471f8a12b0b6e1652d438d527d99eb878152. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f45078838ae1fdae95832c3e607149508b48b8b59bbe9ce3708d806d8ce3d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d3d0535a7ddf915c42086fe7e3f74a326b85aec996575105f07ac66d21bd6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81e094a149d9c72b3484ee59691f4cb0dbc3e64241e05582336073a04659682. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0de71b352c478725d0cbf5f90df796e1e1f52797d1c8b6bfc272f30380d08b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bd78c65b5c53b1d3357a4af93f1201cc5f0dec2f2971fa5c023acbd321bbba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a9124a4164ef4dc321fb75669d675d5171aea0e71f657b4ad3dd69ba84ba82. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e6127afa375c8e121ebf3308f3f6d0be86c65a75c7e242002718bde94f058. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ccd077402790809e966011862259f94e919fd8eee7b964fd3006ebd2982bb1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81578394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1ef12124f8548af3ede62b65aa90d361c6289f00764258bd7896da7c7fdf1a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b2e556a7a067d5f0a0db1883424d76e84debf7547fc1d34d3b6d6c8cc2caa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81e59b0ec7ea90b83a3d24a034bfac5d4eb799fa0116d35695dceba7e96638a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120eb0b136ddc76688fe82e04219804f15bd68723270af6d4f0e3fff7bae90be. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1607fcc220ac359374a573e3dd15c49e95f9de52c37794f69a36643410269b8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GTA031200076.