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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e080851bf5e2c11d764b03e56d922286f6a334396bf02743c63c09c1502a6a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/846d8277-2b63-45fe-9ff7-48c4c179fcd4.json and https://artists.proofprofile.net/proofs/artist/846d8277-2b63-45fe-9ff7-48c4c179fcd4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Arlo & Spot (Hörspiel zum Disney/Pixar Film)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b6fdcea7ae012106ed8490a6636f43ff3ddd0f6bfa8e8819341cf0bf3d62d8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USWD11575319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0db1476176880e4522accdd0fc38d04502d07b67814b81e2783876ac5819e3d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USWD11575320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcb5ef09a5e65c825d83a48e8b5d4d57aace5b12ee3654a92815bc4d8c3a070. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USWD11575321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ff2f5169595b35cef7954e598be86899850a612f7a7cca13e1c4e6d5a1ee7e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USWD11575322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc667f67eb8ed9ee0d9bd7d26ef2e635d706663ad39ad77be69b2b6d0efa054ca. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USWD11575323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8312b528e633419332a9709670eba6fa8fa3efde66058db0b3c7469f64f557f9. 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/USWD11575324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b66156de5808af565225982e805ba1a09b796adb441b321940d79e8a8ec26bd. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USWD11575325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a04b641b4368e1b58d9e577a644df801996ea915794c1e5d9b9466a98d4fd. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USWD11575326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85953ee28931c9c92a93472d9b3c0c426b110d93891e2cab4aa416e17a5bca62. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USWD11575327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1496419da3807825e69fd0c33a0b95b3ab2b167224c61c28d4e2f31fb0a7cc. 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/USWD11575328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e786ad012963520452e4a4367fd4939982dad0e049e098f81ebcbe5780005. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USWD11575329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa9bf93f7b855cdb7f4a8ada18db5a8347bce1099ece8977d7a6b219855bf6f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USWD11575330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1150a840e49ef21d248b36053b6f823ede95187999bddf8d98b8f63eec8686. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USWD11575331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0bde20e03fa4c3a47e59679a0ede2573235530c4c8730376e0b2cbb57fc632. 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/USWD11575332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6771ae559290cb639745514de4d1ddc5263a16644bf670e28d9a6806e3971708. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USWD11575333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd355469887a442abb3d88c99cfa0022df0a6546f4896da2219ffde22c3fa1089. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USWD11575334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e90508508bb3a84542994232969dc354d935a6d043b721dd040fec09d43c051. 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/USWD11575335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bbf4aa708eda29bbd2261ce3563db86e9fa5f36ca61c71cd1170588c91c097. 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/USWD11575336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc59883d441230fe03fcc23a7f54b531d427538f9844d0917ae3e28d2058f55a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USWD11575337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a06b24f7cf324f1432e4c1a1822218a2632e9ec671ec2c153afc5a3dde132e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USWD11575338.