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 0xe2db559ef870b54c7108a3d1f10598adf4dfcc577215bfb98cdebe72c7d0afb9. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/68c3bd67-520e-4261-b31a-679d7ecbfa0e.json and https://artists.proofprofile.net/proofs/artist/68c3bd67-520e-4261-b31a-679d7ecbfa0e.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 0xf0dc6af27d8805e16449de197ea96e1a52866c4279b81f85b2f8d8c0c0158548. 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/SE6TI2190280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf617341e87540237e9230e41ff457ebdd5ac089bd05d89e66fa497204c50b1cc. 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/SE6TI2190281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27d2c93a85606e5dc87e51923954c62552f6b79b0eb748e20bff8594857109d. 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/SE6TI2190282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a6b0e47bcdc40bcdb4e37a77a674df6f42a11443f751510c1ca1c2a249fefa. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SE6TI2190283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8fda4b11c9e0ebf403a66730b931a38158593a200991a7891468c7bfa38397. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6TI2190284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b12142ec2762672976aa99c28aeb716d38a614b236bc6f8831fabdaa269646. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:58Z), 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/SE6TI2190285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d0918145d9e24f3a7751724539cbf06c6b6f20f5911e0184f901f6d5cd5a52. 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/US7VG2464276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fbad1f95d64a10fa324833842e9ced639ac351c88b29108abb3a476036abce. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/US7VG2464277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d457877f971d66d436f35c7c27bca2caa87be112ba6ce874b4d8db87476083. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:45:29Z), 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/US7VG2464278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ea16fdd50d02769e0c7be1a4ca201f19b73bedabf1b2054582ae856107e4e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:54Z), 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/US7VG2464279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b162b329b0e208c8f2671d2db9b0b32fc0c05353073417e9d602a038998691. 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/US7VG2464280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc387f4aca68ed92ddace178deaece077202ff097a680c8bef0740911d18b6e25. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SE6TI2190322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eae7fa9272a9008e7d2234347af91e9471ac4c775ec45163fd7d2790756c478. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:07:37Z), 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/SE6TI2190327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b42ecc9440d9e89c3c2ff209059abd120dde4c74757ea64c32233f0f078ba3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE6TI2190323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe6878dd092c4ec6443f2c16c56b39a321bac299f381734ed474792c79f1014. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:40:21Z), 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/SE6TI2190325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed22c2f7e62c126775e1b7b6042c73aaa95e29388f6b14c92a01d3ee3d3b83. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/SE6TI2190324.