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 0x4046bbe270080c50496551d7a9ea9be0a8834cf4491cd389b9e773c4566f93f5. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4940d2d-96c3-4f4d-9278-6f6dacbfedad.json and https://artists.proofprofile.net/proofs/artist/e4940d2d-96c3-4f4d-9278-6f6dacbfedad.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 0xd0bc12da3d1140a8b2781a289fb9896bddf078ab9a20eeae4acf5436d1c0e2bc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCJPQ2163137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319c12c6e28f00fcc6b0e7b3935ad5b5b53359bc1800bda913b288f9af165ff7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCJPS2230321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d626f46ebfdc8c8a19572ea823b16860aa43e4dbd1b373596215906e43835f2. 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/TCJPS2287241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1c7bb058a333784cf4a10d47d943265ec3febf9d5cf2979b143fc69cd86246. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPW2341621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab59c4eee2432f849d0719e4b944fb26783a2c1e1c25551c82098d72c52645bd. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPW2341623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17aa3c59ed93e53214e947945fbd558ff42aad0819d91c920fb50f95042490e5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPW2341641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade2e9d0b424b13412f54d786477d01b393c87f4ac94406562b3f1c2eee6ab1. 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/TCJPY2327455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588767a6944e3403e91fd596def8f7513c5eee46b2c1f5e6e089a14980ed8b1e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/TCJPY2473508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8135423b9385fdb3614876ba18ead5f7801904c098975b6a87aa652a1dc63f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPY2473509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75b11e8d03d4fade9d4b3e2a632c6f20c9b6c0c30751c176d100a6369e88b8f. 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/TCJPY2473513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831539b56a79677cd73319f5f572a962b505ae2032a1b44bd6a857fcf0d1cabd. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCJPC2409565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3457715782ef7e2e9f7deb87674a6fd7c2d7266b86342045a374df4447d08b05. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/TCJPC2409569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a38b4276c6f537e9cced1ca9648edf777428f792ec9d631dc56bf033c439b. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCJPC2409574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68664e6e8b890657c46c4f69f08881e3d07f98fcc456b815f751b96071f5b33. 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/TCJPC2409581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d669e3acfb6bd4781f3bd0b07ef218e926da250be62618eefb12a5511fe8581. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCJPC2409588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53551059d152d36244be6ac656d4100748257682d4a139d105f7cf97e3e466e. 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/TCJPC2409592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb52e30d7de07bca36edf3d98e6c9d8636f5e7a9414059db7ceb3886957bcae8. 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/TCJPD2545387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf964a5bffa5c4ec6746faf763b5440a5c31e12b013e2104465a1e1342b26c979. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCJPE2502018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd5d3e1323b5997496882a6e5001433bd2fdc604818af98e357ffec1afa1247. 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/TCJPH2567230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804efba11acedb2a543e3dc7c7170304b20d86eb08c900c6af9690ef3454e585. 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/TCJPH2567238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1921560f13ea5f718d997b1b395c302f4c92ccf205caf74aff50e8454cec04c. 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/TCJPH2567248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c3f447add7f5663b281c8a72de64578f225530b490f827c560b5110d0d7eae. 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/TCJPH2567253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e8b2f2ba773f51a28f8c693f28f81d1c0677366ef90ce0e1930bbc59e1b03e. 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/TCJPH2567260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fce0d9aa289ad099e1bcaf1bdab4c62b9e618f004f33ee6b3b411b80657626. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPH2567263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36be6f552842ce099725c679f42cd11233dfeddfec7efdec97a08232c84bcd26. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCJPH2567268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7843f3ed791979ae237fa4eae151ab1908bb5ef8fd5dcb5245abe01ee90f0b6f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QT66J2557100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ab2a75c7dc1bf7eac1b05dda17579a7cd302379d69de369ba411d5a2d7e945. 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/QT66J2585689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f13f25e0b52305061629d1464fcd46614b0c1968789dec732a67ad062e45549. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QT66J2585696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c6e763c060623d3a88383a3a5b73cdb7747608c463d2e9d0f35a21ee44aa4f. 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/QT66J2586841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa987e7c0d75b7a425e537dc33a0b9f66b2072ee298ba49246aec1bb4dba1f5b4. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QT66J2586861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3fb1cf7c2b29032bb4966ba6f52f9082799df4114c075bd3d61e292bf21a3e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT66J2586896.