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 0x934d2b69ea0fd5fa67ce851961580261b107bf9fcdb4157ce46df737f336e95e. 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/afcd2f17-0f0a-4759-b1a8-9b353787ae09.json and https://artists.proofprofile.net/proofs/artist/afcd2f17-0f0a-4759-b1a8-9b353787ae09.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 0x7cb3001ffed44a40f8478b6cc7ed1596f1faea6f971345fa2d01f0d7949ed695. 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/USL4Q2210387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe3fd22cfe6a433d29029015d8ceccb76ffdce07e18c87b89b1a8b7ead892e9. 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/USCGH2329433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc466c3b438bf49a22c1f00c3bd976d4e5c6e53cc8476797f22e27d26639637a0. 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/USL4Q2262190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d506fe0f4bd2d331ceeb6b5659ca11729a81284ac8767886d07f1581882ec0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/USCGH2329434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cc2619f5b79293443d84a09c0a4cc38a78fe1423447866fd682950449200ff. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USCGH2329435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4b6ba7527c616eb2ce683a95a8fa0ff4e4b088e7cab4381a92f2c281dcafd9. 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/USCGH2329436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9233c9f49eff4f3dc14af752606960b70fe40b2ba4200bcd6df78498f3055059. 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/USL4R2240281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad5bd8700668e1fa404b4f5472fb18ee82f4bf5667a75a7db1a990f3222060e. 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/USCGH2329437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66b2335aad8ee5ff6bcef772461da7b2b7a7276615b690f84c39ccf23ff295c. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USCGH2329438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f124070a0db229ffb22c36339967fbcca965a51d32ffd917e93dff452e72f77. 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/USCGH2329439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490703195b80d2e981c2506c2a1344c24ecf643f20c03cd4e3d48f3f0acfc90f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USCGH2329440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af5d7fab184daddc499ed44ae5b30493820c5da16ca2f8391dca30833a0328f. 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/QM99V2309201.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacefcecce2acf5def7e717e7b084ab144b6e4dd2919f4a52aaf093d45205cf2e. 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/QM99V2309202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0c55fa998e3e575c260bc972f3921f2ec496fb266943626fc31681432dfb47. 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/QM99V2309203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe511bb59ccdc7ddd392e83d268adf920fd8872589eed25053b94daeb667955e6. 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/QM99V2309204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b68df4b02ecf134dc9805a435d770563f56e93ca7ae646a6b6d5896ed45057. 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/QM99V2309205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8cc3459deb233749fa8f5a00aaa42568fc5a1ceec146df14f4f5652729ef62. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QM99V2309206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2d76805614365fc1b1d7bd238951b0926c82ac006697795a05c9531f1123a. 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/QM99V2309207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6511a4448f7b7be5beccede380728a5bf57a394cc33021bd880f78b1727ab0. 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/QM99V2309208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad9e7a062559562472a10f37731433eefb44204ef0c48c328c19f2cf1a35d69. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM99V2309209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770db2e9c9e7833352f437fc955abeb611655a542412c0e0a4655d88543e7877. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM99V2309210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9233c9f49eff4f3dc14af752606960b70fe40b2ba4200bcd6df78498f3055059. 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/USL4R2240281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3d48fc9f7e14828c3d74aa1f0268e0e08ec886fb1e08ba5a898a24d883881b. 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/USHM22227323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d6b5a03a8b59d209983e03cd63b02bc0cee9356bb7ba04efec09ec015d76c. 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/USDY42281664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bfca9ca8d3744de6c75bcbd8f8444c371c3762774e3ea158495a303b042442. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM22227324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b3116548aaaf9579360cae0b0a6040197457de47982c6ecc341abfbe9eaeb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM22227325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bf7ab95098fec9d9bc790e8913d8f86194015147b4066a294c84130398761a. 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/USDY42237083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8320012c51d2782b64c350b15772bbd2a0a169ba8d3ddb1b19b51cdf29596adb. 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/USHM22227326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4d6b5a03a8b59d209983e03cd63b02bc0cee9356bb7ba04efec09ec015d76c. 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/USDY42281664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bf7ab95098fec9d9bc790e8913d8f86194015147b4066a294c84130398761a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY42237083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d2285d2ef871da5467730adc53934c02caaeeae6ca43579f0f489a5c45da1. 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/USCGH2017081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93506aac351c2c7404f3326d0b145a7a585136857beb64354a18548c5527be56. 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/USCGH2017082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad8ebcc0a771f0afe784476531af457d1a6a858b789744dfb2774f57d989925. 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/USCGH2017083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eec193a45080aabda23fa3fcc356f962b4a7c35fd91e17fd9bd5449e031dcb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH2017084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486726e8c4d6b46028569051fd1b2cc9a1189cd7346274c7a05d17e2b81c7b75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCGH2012095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896e59f4b3ad2bae1779cc7056ef4336a37b4f5d427f34c40af65e8b133f36b9. 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/USQY51763744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac1b53b28cf6a8a88a48fc00a740b32abc29f1c20153e69416e61ce5bb2b7da. 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/USQY51763748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6931a95215b3e5d274fad817ab1b27903a3c8c04bb0255d2bb5d0e26b902d16. 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/USQY51763747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbad53ee96f8110c6c1a8ee1814a9064ccf9f90d03716af00b7c675b3637192. 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/USQY51763746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484bc59c7fb8223aa5b16f0c44e5db38483928e4cf2dda9c34e95260a2a792ce. 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/USQY51763745.