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 0x98767c0851aef7573a9bc0c54bbf3fdd2fa967876ef7ae3845b7c5d54dfb697f. 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/418086fc-de10-4bad-a982-f29e25e06bfc.json and https://artists.proofprofile.net/proofs/artist/418086fc-de10-4bad-a982-f29e25e06bfc.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 0x3947b43e267d268252b15b0933a82ddbf11f85ba70f8b1484e15a95ebc5bf3d9. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRYAS0859250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe854018cb311e448ab35f7e0408303f46f506e6e7b6ebfffaa65b501a52386ab. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FRYAS0859280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8e201ddd1c11c84ac5dfb260ab95b4fef6b549fe1a841435935255cbb4c250. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRYAS0859310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bfb485e7c0e5c3f5f51b531b46a16d9c87574f93de3a89869feff181a7c821. 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/FRYAS0859320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15936f01336031774da85d3f3d093fede5b22e49bb6c9f8d2bfed6c6acc2af3c. 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/FRYAS0859330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995f3233871c09d6e9de2ccff7aad46c039df6408da19b955437285359c43c66. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FRYAS0859340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec4d536a3edba9fbd5c5c2d90f3466d3144a713ed5542ef3c57c9ed67b467f6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRYAS0859360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68967fc3297b2a6712289f86b6cebe243d970d27631a5bfa45cdf720eda72edc. 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/FRYAS0859380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659c73518ef00abf518a3638613396eb4f0ff94a375cadad0df6ec1a5d913a72. 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/FR6V80196738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4361830f05cbc9c6cee2f0f2805a1088eaf9315a52dfeac58bd2f108be3113a. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR6V80196739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6248522d0a58042bce109302c5a66b3bc09236a09cece5e5f3ae4cd62c68c5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V80196740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370e6f6636522161c8bf459f30e3d2ee9df8954c55e1ee15c15047352304047. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR6V80196743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5679c246ab99fd2e8224a415f679867238a16b9b26c4b00c4ed65951253e361. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR6V80196744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36936d43d86ca9097602bb43707c88798f40f060cfbda24ed3449e58afe45ea1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FR6V80196745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5046fc9f5f284e06c1dcbe470bf9a2cfcb3182cc57530da23b113aeef654ffe3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR6V80196747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd886b0c54b858b1bad2c4446c391f7de1ba8081730344c147422cc7d2faada. 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/FR6V80196748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7879220d009e9015319890065357f4afb5595c2d10c12d2ab3e9302f698bb403. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FR6V80196749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa85766f743dbdd15585c7f7aa33b903e9939eb5af901992b30fd94b12e5ff30. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FR59R1659362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x026d88e5b4db40bc8554f7548e61897cf4433087b79d8c92a5a936d3792135ab. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/FR59R1659363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e6d1e1e717558ef654b346aac162d8470287b3eba0777c5554299e43a16801. 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/FR59R1659365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d251b8201a7fb36d8ddd13940ba86d54d15806402a0d0f1de406647020f5341. 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/FR59R1659369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1a5243948520968817b0741fa85fb04bc5c928e3683d16d2d7867545427622. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR59R1659370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c601f12ebc3e45a94e3a2af38e78df0b06f99ae69f6851829ef0fa297b8c4d. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/FRX201732047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3694bde58ba6b86a1e6601f3b8234f9dcce8870b48b1f84046ff4480deabaaf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FR96X1802545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3cf32858eabe4c4b6171e1fd01a064c12786aebdd2a970cfa60ef73fc31c1a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR96X1802549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5b0d50ee567691b0a7c0c354d6ae8190b58fbe6df6df4c23cdaf4c4bcb6615. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X1802553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4a1680a7589db8f490c295bddd179cbb4f28adfb7523afd728559b6fe36cf8. 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/CIUM72100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca322c16c72f892e688962baed2444bc8724982fc2ba91204c81afe33977051. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/CIUM72100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4747b7a3021e2190d0cacbec290147a6b6f638c5019bae724dc9f83b584ec2de. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CIUM72100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a2751d1bfc2f9b6c4c788f271e0a2a1ec92a18869eb351187c0928b817b394. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CIUM72100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628c0d8f8bd34a260ece9e6706c637c235069baa87e2c1a5f62ae65fc97073b. 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/CI2DY2300671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91c1964d52bc6e6f26bf66b2edbbea17ea7a4854064540ae571da8879543367. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CIA1L2500428.