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 0x85cd11de4491d9e2300a22b3bf9d54c130232153977975ae967469aea3967b6e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9365c0f-7ea7-4a95-af5f-5c45287342ab.json and https://artists.proofprofile.net/proofs/artist/a9365c0f-7ea7-4a95-af5f-5c45287342ab.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 0x1c04b466ece7864f4ec9fc7e40e769f6d42cd95f51e00d21697b637f558c4ddf. 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/QZTAZ2318687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a2531b69759b6b33ba300a890bf23dbb35458464a8fe9fe8915b322d902cd9. 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/QZTB52303137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94132a8f6db90d091972507b6ce3090e90b1a37ea36328171d91549cb3f70e82. 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/QZTBF2398294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda58b87650189b46ba34e6b4237ebe73e8662d2b36ca144c9bcf11c733252d55. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:03:59Z), 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/QZWFQ2363221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1513e3aa186066c5de385f5319f84eed9a97dadfc179aa9dbda9fb12716e653b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:37Z), 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/QZDA42479733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceed5af278024893c458dd24fc6212a698fca97e77d13c9596a3e867347fc75a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES62475637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfc9f8d808cd5535b88917e91d1fbea5c0a578e504c12be18bb12dc2eb94429. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:19:42Z), 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/QZHNA2447790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ddb51f30f6b621ee34ff32b2587ab9ff55660d4ee6fcaca02b954a79941505. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZPLR2473776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87802f1bb930caa44671753e7f33acacb31fed4e90f28651b79199c8e4f0a25e. 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/QZPLR2473777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf419a1a514fd7499e084c15d3a76bef97418b18cc3f879ff59eeb173f1d4c6. 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/QZTB62494935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae95a0f308c7b3bd20df7871f1dc7d572d7a70b015e3c13acb8e89106f12af7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFM2490723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942b60eae420ab1519e434ff2110ed109f796460ac3c140b06ce9f1ca1bee2d. 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/QZZ7R2473199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bec6370e3b7bc70f4bfbe98277d5ecb9497bdc5e326c77eee23a80cba070c8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFZ32535222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe93d882fc2cca6f054c4f5b03f89e957f78b85f0229e9fe3b6de16039b55bf6. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZK6G2591246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab44f3d9949308fdff5ac826b76377737a7d99319db20edc0c9ce1e4d58495. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZNWY2502918.