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 0xb90c7aec99754a56a3b983f8a9b21f7a196fd3622cff5df08d85675c6de87906. 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/0fb83daf-3976-419c-9dbe-b35d47e103bb.json and https://artists.proofprofile.net/proofs/artist/0fb83daf-3976-419c-9dbe-b35d47e103bb.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 0x542bfefa0c242548d4f603c490596992101c12087b85c2197592a34858836498. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DGA052027635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f726e4844876743f3ae4355ae7878df4b6140be1147c12952b2c148e49d597. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DGA052027650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef80f868a21d5b2544f4b6141f537adbe2e9bdb47b76495b7b43a0e7c80a62a. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/DGA052027557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd9d448cbe82da29b67b8c1830276abd123c5c0f93b98fbdcaf6f77338aca8f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DGA052027559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04930f8a4cc58534951d4bf5c2dc253549b671b6c7b8794289cf739c864f9ad7. 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/DGA052027561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492c86b2f5191b6729c3b3c048400de5bf2ea232469bdcd6f5a581515e0448e8. 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/FR10S2143919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fd1fa444feaa48bce99ffbc0757c9dc1146e69bac600416648c70cf86e7905. 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/FRX452122648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27db7302b04fe684ead2445e8309ddf5dc5228a0d905f680c06afe42efd498e6. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FRX872140935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8fd20a4443f22826fcc292df79c373d45c2e201ec323e186d49a5d206b2796. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRX872190031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d5d3bfaaa2bd78cb4fb449e3611d8cb17f578a192d651cd443b67fb1b7c42. 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/AEA0D2192051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb116f3001b5b81e245171facb051e9c3800fdd12a8ed98b453c298279f7c80c9. 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/FRS182157254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f63ee73d876049db13417f4b921bc2bceb17cc2acf34f97e2009914afee80d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/FR10S2281171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fd40e13dbfc1edd82076f6d38120792553e5332123cfe4c8c581414e5960c1. 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/FR2X42243822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3853029f84728af31bed54db0eac4635557ca62d9214a3700fe3072a7172331. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/FR2X42258369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c82f202186b6add54f856356d036cb6d4c29bb17cb0ee2f1dd0bbc0414f72aa. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/FRX202215269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42f9d98883b22cb892a49bcce723225a92dd020a14d4fb11d1fe89fa3829855. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/FRX762282037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eab23708a05caec6108cd5792e98e5d54a7002244a85b14a28878de79348fe3. 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/FRX762282038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cce66752fd1c1c2dd2556471b60aaf24a99efd5f5bc4232cd283abc24edf8ee. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/FR2X42338134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5527ecb202134a45bd0ceadc9a75f7ed827a6ed87ad7e4a786515f5abe3632. 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/FRX872364293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4834700f6c2b2c2e084f9bdf106565b7959cbb77ad124aef4a29c55670d1e806. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/DGA082382545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c5e3a29b214f8732685c6bf35a3ed2ee4e05439e4745ee10e9974faedf561. 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/RUAGT2440718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d7e4ec143cd515d3e6c58d627cff3afd74daf3789739a4f33b795f4fbae2d. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/RUAH62412409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ceabbb04477dad9f6f59b41b1834514bc0d0ccc5f909c6019df6cd648d9a75. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZW9L2490466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496a2ed47e7ee5d67fbe83ef0b5cc877ec9f4ce56aeff1fdf9fb6688f61414e9. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/UKU932520565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8714fc5382c46115d84d11aafbb70591332565fc09ab2f0400d07d406dbf35. 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/RUAGV2501954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfececb6baec2c11f1e9b14071fb337a03cb9aad2ea01530b61187e02fa8fb9d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/UKU932521410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b46a9aca3bda47001ca43019e82f822167272db84b4719ca7ab22a67abaf4. 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/UKU932521564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65df34e5491e0784fe3843b5b45e7241a520625c49633da5fe7e53a47bfdc3f9. 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/RUA1D2552793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe9517a6b996d67cb4bc879045053136b6d590f5e4a214c945324c22cfea7f9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/RUAGV2508153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66483a0dde7e270f92f3c21e2e1e4655990186c1d33455b8e4410e150c27bc58. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAGV2509568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f80884d64119417a288111a7fe8baf76605c7d18279855dc953635aef9328d0. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GB8KE2522680.