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 0x2b02159dd802310849ce5e34741c87cea74f2f664f751ccc49214569a9dd9895. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b7c0647-5631-4244-8506-82eea2eb8d52.json and https://artists.proofprofile.net/proofs/artist/5b7c0647-5631-4244-8506-82eea2eb8d52.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 0x633e2805c384b4041c4337e65d6106fea0cae44b4ea6de9e88b4dd9ad9409ba0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM81494201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5147998ce39d2acf0676969677b1d5e9f6d4cf1fd5ced1e4bf8d7413df265f9. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USHM81494204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e3d19c77be33c3cfe66a2bad28579c3343dcec6ebbe32d4e56a65eff24e726. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:02:09Z), 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/USHM81494207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e71b44bc9e52fef8b23b43f9f1006d4b8a9090887d2beda77f0dacf7fa4e17. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USHM81494208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34b6fe980b915ed8c8399e231af98eb3f530ea1ef287623428ed3755b7f6f43. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81494209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d05842b0b2b11ed2740cb60d250400e8b9689d207ab2799f8afa00fd9fe666. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USHM81494210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14078ba29484129aa882c7277797440df5593997d3844015e31fe1e14b42781. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USHM81494211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9b4ba2e01e1d7e0c1e1ae9156ec2f109d141743bcf81c47bbdfe202bc83d36. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USHM21688380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31d57fb8b0596a9d3cbe1a1ed1853fa227dad755d1ceaee2755a84053e720ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:38:03Z), 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/USHM21688382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20fb0c9a55e1ad95b2cd2af01da35d956f97e69b8339a924507c4c0a6d3dc1e. 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/USHM21688383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cec0bb8bd2fc7cad70401071d484d2114d5a8becd881aec6b448cb4cc5cb68c. 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/USHM21688386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0fc54004425cb861521150acbae8f9fd225cfc66430d5bc73ae359435a0147. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/USHM21688390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0350d27af93371d375671c1a96216f535230c33ed396c4ce71fbdb03cbbcc2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM21961437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf045f6c0aeef935a8b426ed186371db3fe44d1d0b8daff64de0f19c1e789c1. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM21961440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a67fe952fe0d47b3fdb539386126acc0c9dbd8bdff378add24cdf17f7d012f9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USHM21961441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5290db98a4c3a0ba3ead9939825d6fdb57afd6b3fda95dc98cbcdadd3b0cce. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY42373931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872ec19b8d6e087685729ea77fed2d3da3cfae2f012d4258b7c0e3f38d81dc22. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USDY42373934.