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
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e47edbbf73d05ba4243590ed48136a6b7699ba365ee9c9796de55b54920a6aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 0xaded7c7515cae604ab3585dd8e2dfdf43cbf732e09806750e0db0fdd0c803ab0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 0x1e0db528308f48c5ef3c2fc06ac9fa306f9dc2550e9112712852f87032158a1e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 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 957124 (2026-07-08T03:53:27Z), 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 957145 (2026-07-08T08:56:20Z), 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 956312 (2026-07-02T05:09:12Z), 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 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/GTA031200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81e59b0ec7ea90b83a3d24a034bfac5d4eb799fa0116d35695dceba7e96638a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GTA031200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495da0aef0799a9fea2804454d13432bf5a9c9b7bd91932dae7d25afed8fcb50. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 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 0xd81b32445138f003f350b29a83a953eb723b5d5685289d0ffe35777d02fcd34d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:36:59Z), 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 0xf7f45078838ae1fdae95832c3e607149508b48b8b59bbe9ce3708d806d8ce3d7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GTA031200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0de71b352c478725d0cbf5f90df796e1e1f52797d1c8b6bfc272f30380d08b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:18:28Z), 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 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/GTA031200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766e6127afa375c8e121ebf3308f3f6d0be86c65a75c7e242002718bde94f058. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 0x4e1ef12124f8548af3ede62b65aa90d361c6289f00764258bd7896da7c7fdf1a. 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/GTA031200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755b2e556a7a067d5f0a0db1883424d76e84debf7547fc1d34d3b6d6c8cc2caa. 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/GTA031200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81e59b0ec7ea90b83a3d24a034bfac5d4eb799fa0116d35695dceba7e96638a. 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/GTA031200074.