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 0x55c1b4d39ad328daa216680b2603ed29f1e4923f6ccb40c843123d811831f093. 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/c26902ff-1439-4bd4-a6f8-a59643cc9ad9.json and https://artists.proofprofile.net/proofs/artist/c26902ff-1439-4bd4-a6f8-a59643cc9ad9.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 0x0ab405a20df57a2617db7e744ae9f46d585661247009f7fed02906191ca28b2d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRY451300516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed583ce6520c0a5678db81d46202d1b3bc2b887753751340f86625ebb9b6809. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FRY451300517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0090ae1d3c1efe7e2f864ce3d819446d25579dcc76dac14a203ff333aab88bf2. 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/FRY451300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e91ddcc4aa6bc4e4374e3cdcae14a3d290a40f7802fd619291d9cb38fed0eaa. 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/FRY451300521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b40bfe846587abc1e6ec9a8d66744f6acafb9dd6fae3f696aeb5a2baffbd40. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRY451300523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3267b5c2d93fdf7db09fee3f7baf9c719d2d7e7f945ba54a9ed8e3690b9af54. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FRY451300525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e230fad771830e1b46ecba6eb5a08cdf0f9e0871efb7f1f291decf27dac0a9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FRY451300526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf785f9ff11da465f1ca7f89bdadba56272cf11b9709fa4a07ab69379f2ed4dc4. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRY451800560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb8b27149c89a8610fe22705f298182c83c3cb6449757d92bbaed7bb19aacb0. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/FRY451800562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84045644ff15e62b05dc00e24ad08b4cf860c330f6b86620cf7f86bc55d9edd9. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FRY451800563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaaae78fe61d051a76bc2df165d7c90f58853d6cd2ecbd70b25622e0a8d38f1. 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/FRY451800564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0146a5497763447fc298824dbe72df46088d4b7723f5c05c87182fe896864f84. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/FRY451800565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230789a1132b024ef521f5c76109c624327db48cddc4553836ecfac4bea4c666. 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/FRY451800569.