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 0x2b410e460c29b92dcb4b5f35f94f49deeb86f0f813ca644858f53e6302fe84d2. 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/96dd9c49-a9a6-4550-a496-b32e3df8fe2e.json and https://artists.proofprofile.net/proofs/artist/96dd9c49-a9a6-4550-a496-b32e3df8fe2e.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 0xf6eacdd32ff5569c50bcffb15802dbee5674235d1f3d00e697df93b612a1d37b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEAF71252132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d49ea8c54c60698f4d8f776be875d3522e89b578a48a6c83f820b7c9eda884. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEAF71252116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec27962d0a8966fd637b6941fb7094d2a0d8a8d95a235ca6dadcf04bbda6338. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEAF71252040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7951d86e11334d628a93e0b5bdfeec4f57c8678b8d54297cf0e90450e7596a0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEAF71252047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d31c2698ca4198389f243b9332c951bc1acabe9821125dd508567c85f8ef28a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEAF71252048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f11b87345e17d8dfec105f30db717188e316ea024c4b91b1f59acfa107a5f1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/DEAF71252049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5f5ff45c476e6a49a4824a0bd483f78700eed4c0e2bf78d1b676ffa334bb81. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEAF71252050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31675a5d2c4131942f2fef8d6654b35b4affde205d2039f2790e778e6701fc5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEAF71252051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8856544951577a27ae3947e21a553d8b9ad98f10ac19e4486310a1f877f15df. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEAF71252124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e632c81b12e6e97920aea46b61f755e9ef5a53d6bac80b3df3edadf684ac740. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/DEAF71252075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85c2e6798a347eff15048a080669ae29f213a90ed8f5a5e34acdcae728369c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEAF71252076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca3312ff0ac2bb67695bf2b8019b18ff26a301fe0ace8db5ba4ebf29c483d98. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEAF71252078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca3312ff0ac2bb67695bf2b8019b18ff26a301fe0ace8db5ba4ebf29c483d98. 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/DEAF71252078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fec094426d052bef33a9ded048f38c45f805255a66efcebc9ff41b9d698c4c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEAF71252082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95286db0dde4081ec04d507641ce3660e43fd404740778c239360fc0c7db7f73. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEAF71252085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc1f39595654d7214bc74ae6deb284cb4adc02b496f95a5470ce66e25bf80f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEAF71252086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f794c0b1bbc9cd3fd190b21d1547805ff4a47defec773b2f03b7247a3b8c8d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEAF71252087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73a492aa4ef3ff4885664b0805fb603c08e4a4548a9093ca88a19b7c3e9ae41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEAF71252088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94392a623db1c6392a8a65bafb0520eb9dcf19f4286d7da7b9d40720d6f55c01. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEAF71252107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5207a74c73ecde9355da13fa360243d529a0999e9031e6b847ed3ba1bcd1ae29. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEAF71252109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c85c2e6798a347eff15048a080669ae29f213a90ed8f5a5e34acdcae728369c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEAF71252076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b30b0524881c7d22a92f8d90a8948e85cdb8ebbf534b3e5e51b95824116ad72. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEAF71252080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cded4bb86df03ae5b0e823eee656a3a280ac658a4c229f3beeba7a3ec49b350. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEAF71252053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676a87cf8f48e8623c5451010bf9509da53961e4008c0415aa2e74c9928ae490. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEAF71252054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193f18511b4a86f4cd290cf5c5aa4158e593ca8fd5967593feb8410132087cc2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEAF71252056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6196dd3ee5e89856c20c0a4a8344e0246d346d8955787673cddcc79841cca40d. 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/DEAF71252057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b493cb01fee20a79d76017daa6fffe3c3e089b9aaab96709c38b532f472049b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEAF71252058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe442aecf6757cb21f894df7e01efb4b89120a15d72ec67cc819a2d9c8a137928. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEAF71252067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe1578009a37ffaa2823e7d0e7a91ccf0fd06879a16cc5183bfe0904d44336a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEAF71252092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058b1929e45a8f4bb1f6272ec7a1a16de8a51a721d8bc4eae3a4e99c81c8d100. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/DEAF71252094.