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 0x331a7f4052a63a0f0caa89644a6497fa41cbe859ec8c53cdf1d873fdbb862d14. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c2b5758-4385-40e2-96e4-8d45a55e835a.json and https://artists.proofprofile.net/proofs/artist/9c2b5758-4385-40e2-96e4-8d45a55e835a.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 0xaceafb8c2c79abbd8ef1c27d85190a4015fb622ced1c60405d4ebb8ce77a7fd6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5IB1701522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ccc14b059e8930f3f4ff89f524c78accf3c6883a4e1e7299ef8d9da9f8895d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5IB1701536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf4f381b5bdd74ca03fc24251c5cdd218c85883c1a9a6c90201949fb777bb63. 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/SE5IB1701521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1684de73deff3f9a7d12e1338e049b0fa67075e6409cab5c93b79c7a3d6352. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SE5IB1701611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea08212d3a367b1098a6065ca7514d709f245199b2fb8e9a2f7b9d3b0217151. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/SE5IB1701371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbd6e19f863d85d23aee94cb4f409c2f53c9a9d959e5409498391af692395cf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5IB1701370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9314be0dde6d02510365af9ffe434cb9d6515d8ffbe15e1919f3ae543b3f6d. 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/SE5IB1800455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4b3a3d7ba73cc4923494c53f10a30a9b05f6a900873b74b422b4f677101d7f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE5IB1701619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fc349e1fab6e8ddf6d62d729416d7aa200cec4342b3542a5dcebcaa84d525f. 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/SE5IB1701520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738eb31387947276c708e7069a930880ca4ce50249a86019b4d56fe5f648b453. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5IB1701716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34fa719ab5d59dc25441d0509d41c3db17d628bfba50c817f9c862300a430fd. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SE5IB1701497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d66bfbb1caea27fd00421d3042e6b41f8f4b863c6cebf6e664b1f783693667. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5IB1600560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff236268145d4629484abad1c9ad1e3b26aa61fa9bed0e20f886aeeb1116fa7. 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/SE5IB1701562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cb0eb0fb58a650828e0037f89e96bec0f9a8615b586a042919d56ac38da94f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5IB1701606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a337090c141417348c75de35fea24457c6d333d28e8d1ba70cd0536ee53b80. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5IB1701612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517b0637ab1a455674b5ad9d285cfe335bdb4c8e81a5935dfb4b5bcb95927162. 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/SE5IB1701524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6a0e8be4f56353f5fafbe39f887c73c4eb945a2a50022d54966d32f0a061a. 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/SE5IB1701715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff780d2960bf8f2d638dc3e5b6f83d20d69533743cf46007fd9c46e2b8e86b6. 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/SE5IB1701633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d862568159fc8165ac4eb0bacc4b0cf54a60182652ff55f6a94e31485b1c5d. 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/SE5IB1800278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7582931f58f806b61bb441f01de6f2e2d58e1065966b7c1f5e22f1dcb3a1c547. 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/SE5IB1800290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aedd50218418877eb88da966cb5125693538bd1026bed902b0fca71000de73. 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/SE5IB1701744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5236d5d0c3d70fdf6e987f8ee7b989a38e4cba590329fdfc4b408459a6e90eb7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5IB1701791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b246e7c42d85cb2be74448e8ef08b53b33e4ff8a6d308b3361b643912488db8. 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/SE5IB1701498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5edfa45e3203bc4b1f70d4a17e0e28b4201ed8792b976565e00af99ff2972db. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE5IB1701814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed71e47fdce9b86a8ce84430d6f2c5082e5717d75b526aba680af917d093cbc. 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/SE5IB1800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84dd46c27332ed2aa27f1e14baa9789be4f83ca01e0f8c95a2f6009321d3abc. 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/SE5IB1800681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434aa49ab4d5e7ed7f2636be784e8b4284016a4cc791dfef1a0d9d04f15d967b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/SE5IB1800456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498124af6f6003e4f7fc5e2898404bbd9dbc4a582aec0de30b2879c72b47ebbb. 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/SE5IB1800682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0ef39adc989cd0e0f3fbc6ed3ba6071641e72de74cdd2db275bab80b03d23c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SE5IB1801083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68096b3e3e56d3b40176d7a29f3f9cbb0ad51013d12310ef09d03dd6daf9243e. 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/SE5IB1800975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cfb4c01fbf20987ac48297cd346502d2df047a67155f67aede7c61254707c4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5IB1800634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceafb8c2c79abbd8ef1c27d85190a4015fb622ced1c60405d4ebb8ce77a7fd6. 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/SE5IB1701522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d59c5ba30597df2e05af868f577ec8a53123d970eb89e235fe8b315fe9b721. 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/SE5IB1701564.