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 0xf65df7607e649f849a58e277c12860d4f3e23943ec5e7c422fd5ba4db0fd44c3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e02c3e22-31a2-49ae-8566-c0d56dfe39e5.json and https://artists.proofprofile.net/proofs/artist/e02c3e22-31a2-49ae-8566-c0d56dfe39e5.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 0x709791f197d5587557bfa4fae70b36e1870e8041ecc0dd3ab025e6553849790e. 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/ZAVSO2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148cb75372df23a621adf3ad9305b6e8fbe8104f622bdf719b8deab2d88f48ba. 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/ZAVSO2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a6a38e1227ac7d4a15eb642af2e3dc0edf1c066bd82594ee8786be2f619917. 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/ZAVSO2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339cd1660c2d2bbba17fe4ed4eea8c285161cdf7e3e7bf943dc8d2d66467f978. 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/ZAVSO2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1800add7ca161cd37e672bcd7e25cd89005ac56364e7d8db44e2f53af79510. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ZAVSO2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4bd8a7a0091d9889585c1bbae68ed7d348d2688ffc4b6a16e8bd32307e5dd5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ZAVSO2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02ae28137cb152c308b7221396837762e9c563b08d46db29f2aad52af734849. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/ZAVSO2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1681c7d9944b480550c9fe24adf5aaff44fc01f0231f4344931aae8397fa8e94. 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/ZAVSO2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd28ee5f64e06a5773eaa499de4aea5ef99b560dfc0b5a720b47f97a647a2fd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:49:09Z), 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/QZK6G2451283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2346c6db0118490184f4ae611ba0bff2c62d5a7eed0df6f914a4e713b0834d0a. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/ZAVSO2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c11518b7fc66632e314d0a9c0de8361e938daebbbd36ab4b48b7577903199c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ZAVSO2500008.