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 0x282be322d096fac10fcdcbf9a7ed4addb4db116c8349150b41d251e52aa0bf13. 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/622ea00e-a177-499c-add2-aa367a822d5c.json and https://artists.proofprofile.net/proofs/artist/622ea00e-a177-499c-add2-aa367a822d5c.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 0xf08dc69d701f5d50e1ac198712008105e57fce2cd2ad44a79ded396aadc4bb16. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCADF1777183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307128309bc31bb92e1b78725b08ba72d0766981337a5e1d75dba93378cd92d9. 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/FR2X41840083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b1a8b37b5a087b5d6d9d361a34785aa2c8816c1633bbe186655ceef20f3634. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR2X41840085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79820a79745f3ae065f162e8f85e04b593b991a77efa468b1ec4db8b0e1747cd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR2X41840086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01ad5093f87efdc264d309b44289eb6f600b43085cab2e34192242c85d2cce. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR2X41840087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67a051f46dc3a9a5ce0a631459867f07fe85b149a3f2627a3cab7c535372dc4. 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/TCAEE1995756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a9f05e76ae381b7c5be0f95f646f1b0f4e7216ddf9739b464194f434ac1f9f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FRZ041901848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4ffe742023eb7c2565a3c4281e6992b362cb7f027dc34f77a818573e0b0ab2. 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/FRZ041901924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c52b1f055c0536be1961631ec9fea4d673bc4bd3e3104741fa9496dd4891788. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRZ041902082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f06415926b64fc8c2645069bfe0c850a6b7023ac1aae620557d5aa934c43300. 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/FRZ041902083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a9f05e76ae381b7c5be0f95f646f1b0f4e7216ddf9739b464194f434ac1f9f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRZ041901848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1030da49bbcae1babf8b716814f7be44eb74e42e99775764e669b227799d18f9. 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/FRZ041902086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff433f91b29db2a9bd72be914c560eb7a7f5f437f77b98442bd366435d45fa76. 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/FRZ041902087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43701d0aed753fea9a0982abe88d2fbe80369ac8891f770a2ffec559162fffb4. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FRZ041902088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06443a3caece80c132497486ad26a2064554f7ad4434f1bc942bdc0147c24aeb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRZ041902089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7e221e549df7db93eb802393445b4c767736e060268d800169e0cd27078434. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FRZ042001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5704b00e5c01a837fbe0b87916febbfee1f366c0c0d3a3fb763bf45d1b9d73. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRZ042001102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcbb75c9ca2129df49e9c39ceab374023b60623f31beea9f6e02ee0c7c4e554. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FRZ042001103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532e7c0e0b93e2059d97ae8e80e0b358e9d148e7d4a9f4d4e1d95893712dce60. 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/FRZ042100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ef7f0e6308b0a3f948c7010771c888d0080a2cc61c87ccbcd876bcc3d9f052. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FRZ042100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4447e1d452e058ab2bb6e010e6005cd5ad236e7e5963001ef0606d6480f0f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/FRZ042100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b19263a5f23631e0758f6bd04f86ea262bdddc9a1c18a1e1e6482fbc012033c. 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/FRZ042100103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa307c9794b5b1a8c8b96bc3fc4940d3d9f905e3bbe23cc730064657fd7ed0484. 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/FRZ042100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f087b58381e8de3ae6d6aa7a62d7a8105bab929e9f1968f983e7b139318a3b. 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/FRZ042100106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaff7903b069f6df4ea217e5de13fb60f4f1ec2a8386e1adee0b73e8d1779b91. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FRZ042100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb61e7823983610baa59101a9013e69d082dd899438677b749fb246c2bb0a844. 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/FRZ042100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe206918d4752baaebd081ed4004ca25e1ca9bf38dcb52a2eb3158b135a243e37. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRZ042100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328a3044561452944520ae140bfdd43e0d35936499132a4eca04ef784b1700af. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRZ042100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b171ab0011e7767bb83bf645f95904d5bddc44b0585e3d84400876abf60a843. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRIDO1811724.