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 0xfcf6616bcf03a4b88fdb883fc72d001dba25eb773320ff2a94aaac4bec6d3df7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06e795da-7441-4cb2-8198-81da8de0b2f5.json and https://artists.proofprofile.net/proofs/artist/06e795da-7441-4cb2-8198-81da8de0b2f5.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 0x568f0db42a37237964653d8ccd07415ed1d9a70c92467f7f517c5d23b9df7b9b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USUYG1122798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8622cbcfa71c4b515c06f5dba8ed25ca3930f7b267594fc513f2349e21fa5a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USUYG1122801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84ef2b72653ac14c192a506b5c88eb6c1bb7a2eeeafb30f6d3add0536f039b9. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/USUYG1122804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d942ae3b16a4fecf0b552865ac0f9528b48c171b37df7ca85e64f1f6a7caf6. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USUYG1122805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3171da9cc4e122e1729b228b7a6ad469bbba94b382cb5f68465c336fafeef934. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USUYG1122806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fe6703d78ac6174d735ecf2a9d852e1fb7fee519467adf78d7ac74b5394bbb. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USUYG1126830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa130729655d00c274e9b580a9af23d8bd95ac476d163bc9e48230ede562849c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USUYG1161213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a326ab40241444e68966670332d8b037ba31924cdb3d947063e63b0c2852a4a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USUYG1161217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ef48e97b2e6438a20c9e71b0adc23e24364d89d4ad2a0cbc4e86655db9eb3d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USUYG1161219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3bde3e92e1f78cb8fc7a47be755cead46a0fe787a3c2c35ccde1ff80469189. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USUYG1139452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7761c067a7c0a5f0b5550581461ec25926bf155e85a8bb890bc0fbacd1b673. 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/USUYG1139453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f457a9a0159533de86c96ce63f2d0e347e30154417af6ab0e7c30149bf78b01. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USUYG1139454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8f691008e4fc0c69c14b3a684f15f9111d8c3002e105defdaa6a33affe925. 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/USUYG1139455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5440a18ebdf1d146a494291faa83b10a5a7682e0084fb8daab38f2e248374d. 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/USUYG1139456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50aae8289500e78acb4e4bace166444db1e860049ec1271b65a07846f9ae309. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USUYG1139457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74502fa62eb8a6b9d615494310556dcbfda6949b91b0209e00684db28433061b. 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/USUYG1139458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e20de4612cfc51c5c389e796dadaa9fd611bfc7471a52b32ee74ffbb2df721b. 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/USUYG1139460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8364e9d7371183f471e2a19d9f54bec76fa5d6531578a935f51ce0a90a8a66. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/USUYG1139461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb0baa5f4cdf030e45a8e341703f81dc7a916f3628127dfac8de8892504180a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USUYG1139462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bfd4f0aa6ff24d88f0a134e84c76a1200d763d52276ed2a072cd7ba71b98fb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USBAE2204940.