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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52317f2fa668b51d63a90fd930d9426bf670d3cdb0174d4dbe622c5b3ed36aba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74703ef4-5e2c-4058-b6d0-5506f48ab01a.json and https://artists.proofprofile.net/proofs/artist/74703ef4-5e2c-4058-b6d0-5506f48ab01a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aefaa870af35ec5e1e6be2d687571a8e4c79cd091ed523f06bb5710f2f5a6e3. 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/QZNWW2103221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c50f605032632233682b5286c152ec91c48c04e4b4fa82e26ff59a0d72f3e35. 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/QZNWW2103222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4286cd52ebc524a0ca40711384840f722978fceab9a7ab3b5f955de5e5504ef. 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/QZNWW2103223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b92bd0055516d47ec2585b6f9fa6bc8058d4ffd94ab210da88efdeb22bd3918. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMER2103510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346cd8033a1847907fcc9ae25646673aeda3a0dfccce527ac394e0c1585910af. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMER2103511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc010f61616830cac5ff47c43e82cb92860a9df5c46d187369ea6f6aa9cdb44. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US23A1573796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b95130d16168d46f58514d43e48d73b7f072ff0976bef8a8cf1e1709c70cb2. 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/US23A1573797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66354efcccb3c9e80bc9f0e549f7fddf41c59e2af602fcdeb31624b8151116b1. 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/US23A1567916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bf4ef344e253d84a9d9be3e9ef70fa33fa0d200d015e587809be1f4b62bdac. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US23A1567920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7beae70b7409bbf774c8d47d206eac3f4b396834f4eaee4682a4e80332f0e07. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/US23A1567914.
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 0x66faf5e04cb2364aa594f0a6e1f8955ba01af46caecb45cea2e84d9508c41d13. 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/US23A1563412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1af5a793e7a88c617f449f12bd92a08141574545233c973e0c5a2bdc8ab4ea. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US23A1563414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a01e7139e258a1fd690223b5115f6f5bc5d8e0c88ced3bf2a16a73df49b38. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US23A1561142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa792e8a590a1527bea042308f6610ac6b8644efb7e4196455674065626faf5. 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/US23A1561145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ae046738b3e3b10947132249293afadbf7a1151a864985d6e2a4a049c59270. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/US23A1559424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a50b977fe6ca7e4acba35aa421a64cf3cc66d45274b7b97460c91fcee85543. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US23A1559425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2160504d874ee266bcbe5c2b072ab3fd06e10b1a6014e4c5c557780fa9d0cffd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US23A1559427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa43a146519e756e07b97350f6550c428e77c6a384a2391840fd9146aceeae56. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US23A1559430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76319ce561ef377db3b0d28dfda89cd43981a1e2683e8c6728f1bef6028ca358. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US23A1555485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bcf22365b357de4411c07635a69e89e26851c0763480d770cee9bb2a6fdfde. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/US23A1555487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f743c527cdd0c241c0190f449df7e18b32e225e24a1ecdf82575f774841b79. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US23A1553815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063d0285d52b5ea49f852d755ec7f21748350853a8e41109b6bfc7d86134d383. 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/US23A1553817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486e44c5c39717b9b7bfd92af3ad3fbe6e8513efaad10d77c5b12324cbf5e6ba. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US23A1553816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1649569fa719f51a31030503c0c38410083ed921da48866ec17cce1461ef27. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/US23A1550465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8776476c654ac9cb70a13d26d94c7f5ef563f0c81115b89c96f4fde0e20c9cc. 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/US23A1548678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b81cbf321ec4f38e9005051b0124a91728c7d4dc27b9fe6df2e469a3516271. 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/US23A1547040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1336cd51c749439fc7ccb73a2988b3ad46277fadf486de0d5220d7cc33065aef. 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/US23A1547043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35f634ec2e22ae36a61fa084a1d876d735490acd401b3b108dbd4a1416b97f6. 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/QZPLS2012404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7145c8d1568eb57d72485a3b992494dcd18021c72e9269b05cd89c09a4b5b4a0. 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/QZK6G2110986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb59d7d10171c4fffc8c3169fa1062ff4a2fd0611c6beeb9429b06a5225c3ad. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZK6G2110983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bc5d5cbd1001a0f4a96c10a16795c54b85b692640a9d87134db444b4c71402. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6L2163667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd26a3b8bdfdcdc2459eba56678c5eb57fec83800477d2df3ccf1ed1c7409e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6L2163668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfabb4d945a790492cae20fd2c47825e668e56d07a1168fa7ec76a39127a0a46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2163669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ba92cad163a8f52b70511228a78615de65326133ef9eecefa9d03b823c74f. 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/QZHN72178894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b25e366139de4523639f1989fec6aabf104d80723cf488c7f2454ee298f2686. 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/QZES82113877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3840f6c8ed8bac7e79efc49d9dfa2805022791ce3e9e918167f980ee3c51d1c9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES52195869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cc17732ba0ef346b9ac782cf5209f6fadf044e18543269910f77465aa3a8cb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZES52195868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40aa07d61a8760073970220f12a2e7477ab786b83d6663b6d111f8300745cec2. 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/QZDA82165353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6edec1441db8961c5750c1572f8a2d3dd3563a2f6b6760f1c042fa1106fd16. 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/QZDA62109545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc68ef57b78983b544e15db3132ca06e0848cf9525808868017899aba76ed01. 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/QZDA42177520.