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 0x4fa89c15f734c26c8c380407805b73be5aa961f4eea2a3dcda14002a78183578. 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/9368e6e6-ee2e-4426-9a50-7b58c62e5555.json and https://artists.proofprofile.net/proofs/artist/9368e6e6-ee2e-4426-9a50-7b58c62e5555.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 0x54dba823e8aa46d7ba732e866a59421f8432b00a009a156587646dfd95fc608b. 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/USWL12201411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea32f43ba21b449d428f2797d29a81e43fca2ddaa8955ac7804e384fe82c1711. 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/QZL432100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1cd594449038fbd57874b94e55815dcb1e8bfae385f0f0580ddaf6e71de0d4. 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/USSD12100701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388015edf490da03cd85928fe08ceaf9e4071b6145168cbad93131de6e7377a. 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/USSD12100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5f9145ce46475b4f17d6196d6ea5a2ffc0ddb37d084c903bf48445cd0bfa95. 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/QZL432200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8616d8b0358e342ee5f75b338c3557dc7c3e02a6ff1449b9f70810adab1957. 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/QZL432300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb51e0d47baecffc97f4fdef2d15b6bc55b7c96c2ac1b5491ff7cd87cc3fc160. 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/QM6MZ2465721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99daaea72643c98fd76de9f98187108e9ddea64a68e156f53c8909e847f6c3f. 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/QZS7J2314996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bd83d8abedc2941dcb5f37852fa6b4fd54092da1ecb28091e23f25ceef107c. 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/USWL12201401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd789cc6727d987a30ebee50ba89c3c64646ca7ab2f16c68cfed8818324aaacf1. 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/QZTPX2329289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ef311e240c448cba13467b40c89593e05f1e36e0ed236a1cae0813f948d31. 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/QZTLA2423918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727e97e9edf4159b77be5958fa7d3f5c12fad3a02a52292a55fffb2787aae7ad. 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/USNPW2400807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefea2e0d8a71a5d18aae801fb1f9fd9d4bd46715465ee032cf7ef808947da1dd. 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/QZTB82411691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c438f820579d765f0278317d0bc61ffbd5cb32dae21f89472659d048a12eaf. 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/QZTB82411692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf773a9f9dad5e52535955b1417183d9f2156ae482813a40058313600124abc50. 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/QZTB82411693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f31145405026e5ed1d3f2c21dd68892a61713f00dca88c773260d92596976. 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/QZTB82411694.