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 0x4e8021c91854a3d142d7c49c54a34013566613851ae48b0c012da124ab1a2271. 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/65010959-0742-4f00-b3b2-7cae976d4fcb.json and https://artists.proofprofile.net/proofs/artist/65010959-0742-4f00-b3b2-7cae976d4fcb.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 0xc038a46b8245c1201b9812d1fee1c43fd74c52a53f44932f19fdb117527cb6f3. 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/USUYG1354635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3e764a7bb82ac627b3bab9800ef4eb041e07714cea3bc04c735881814e26b. 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/USUYG1327142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3e764a7bb82ac627b3bab9800ef4eb041e07714cea3bc04c735881814e26b. 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/USUYG1327142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc038a46b8245c1201b9812d1fee1c43fd74c52a53f44932f19fdb117527cb6f3. 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/USUYG1354635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26226e20cd96661274ba9c970664f4fe476853eb06d19c1f3bcf54914d698083. 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/USUYG1379043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c55c4b9c57d52c5694cedee36b5c7521897c9ba090b11a80a2d0ff01ced4cec. 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/QM6P41821822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0942d93aacb57611f71a994665459d0e8473f45c96e5f9c41dc25daa0cc1d280. 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/QM6P41821823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0c2a20c430608fc12d8bb40bd489e5c69e334083009a99aeb231683674fa93. 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/QM6P41821828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b721cea5fc163dc5e29f74113317c774a06b361b8c5a86c9845d69fcb63fd75. 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/QM6P41821833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da4f02a145e77c753269579a8e2a4430d2a66bef6eec597c40c5c81f8165126. 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/QM6P41821834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab9dac224c2eff7bc3f3d3416c518599dc5a25685ff7bf4688c91b0b8a0e76. 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/QM7282384364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a773986e7a9f127a090265cba24437b6d162873eb0258bc76ebcc5af67e6fb. 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/USUYG1439806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26226e20cd96661274ba9c970664f4fe476853eb06d19c1f3bcf54914d698083. 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/USUYG1379043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0195f5fa2f2cab57ca2fbb01fef5e52e6a9be0239a0b6ee2a2c71a39bfca8404. 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/QM4TW2099920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8931e775b10f0eecdff4bbab62569d78dcb2e3a208b5123d4f46c9978c1128. 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/QZ7R41853255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9698c938426df8a4289f7d2d6f890f31d239d89c0b033893a2819557c99f1b03. 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/QZ7R41851616.