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 0xb676bed3e4bb8b3d62c21db5652e328c729d6d00276fb9dfd3b133b279ea4427. 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/4e902b05-bf7a-4509-987f-bad132833f72.json and https://artists.proofprofile.net/proofs/artist/4e902b05-bf7a-4509-987f-bad132833f72.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 0x790aef65841794dc0f0e0930cfe39889903f5480973f5290da1dd3349fe58b1c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF1727657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed47a8f6390a04be35dd69104854dd9003951af915e4ab5f2edc182ed64bde3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US3DF1727659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fcd1c657b6d37175c6f9de6844ba343e9db3817f127728efc0d170ca3460ea. 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/US3DF1727700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bee9fbbbc6e44ed40923ab95ece2a91a9b8c087665dda4c028d4651b4b3bd2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/US3DF1727701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7cccbdb2484ac2ce044f164144280fd25eb32a79b4845ff0c7cbc7748f1eaf. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/US3DF1727703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4bf490781abee6b5c27d65690721525c2f5dd9a883a8dfda855cf4d3013418. 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/US3DF1727704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b98ad42a6068777edc7f7438209ff4bc015e4f2889bd2dea375e9bbc7d865. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/US3DF1727676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7602e8890a2f2642bc9367f2cfa91b8ca044b14f5e9401629cbb49150de93cc0. 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/US3DF1727677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c7723a8e63ca08cdf488f2c6de565623f3fd94e296f2f6339253bddef8214. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/US3DF1727678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6091404b4f53a2b7c2d4f12fba77830817d27b5761e40573f4cbf7c14f1e307. 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/US3DF1727679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12f06a1bbb9e9dbc4ebcd84d532e23d63669487ad9dcc34eadd03f0b8616fc5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:39:15Z), 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/US3DF1727683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabc54d63bb5dd11d76428a41a0e605924b9a914a37de3b61617ab015aca92c1. 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/US3DF1727685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70892bc46c93c74f3b268c22e67e4acdb8a458a8208a3cd51db099abd34ae104. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF1727686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35cbf83f4632cd1c7a13b59fc2bb6fc90b4f0dc899d2bba0bce5a64f1343a68. 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/US3DF1929487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4a5d902da9ac7f0fc4638d21b54bcc4ed3b29b675d54c623b0473c8cb252f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3DF1929489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363e431ca150d07b99d15686e4c8f21c0651765a015d3a5e766436d61f4e4554. 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/US3DF1929490.