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 0xa7a7b1ca7229702afd0512461bc3eacbcbd48263b2342730d816e609051afad0. 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/710b24c9-67f7-464d-bfc1-69ff2faf91b5.json and https://artists.proofprofile.net/proofs/artist/710b24c9-67f7-464d-bfc1-69ff2faf91b5.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 0x30c4282fd168390fd2e578faa076307914a0430c5e690c498c53af135d18bf35. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TWAI17600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1b3a465ea7787eb259103136f5cceacd40191edcfd639ddea0bdc324a00978. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TWAI17600082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bdf36953dbf946cc3fc8b6bbc96d68e660015347ebb2e29710b3f9acd68ebc. 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/TWAI17600088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0dc25ac855f16106b6ac96542f7fe1eb8c31aa3f9d78ca4be492e5303547ff. 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/TWAI17700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3ed1a2187f809a05030edfa0c89bbd16fd5508305a8fac5cac6860ea435826. 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/TWAI17700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac0e645095f5ec3fed2f2d337dc1157ac6bb88ef17d446d331696681a27fcfc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TWAI17700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5861cbfd3ee16bb85d8dfc6c4f30d929d495dc2ed900ed2fed2def9c1ccf3ce. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWAI17700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b679f3c003395fd671fe6c0a3b0d0ac60345201359b12c489149be5a615737. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TWAI17700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbaa44a71823dcef3c7b53063d4d42eafbaf85a57eca65c90c38e69138acc8e1. 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/TWAI17700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f25383582467dd433881b1e445af78aad8607707f65a2ec4b052431fb2504. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TWAI17700059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d564b272ba1c7a438480be4ebd0cee033a6e203f547146c5ce5df7daeed223. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TWAI17700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c4c7b068abee77fdb27a07753ea7eeedc24a48f1836b64ad8a2ec939a3b7c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TWAI17700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f92eeae312b2c38e035138bc8f26db66f64dfcec059b23cdeb6f30f7a53bd2. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:51:42Z), 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/TWAI17700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e28257103d060e1bb57369e79077dd782d09e951d451e71c2cabd44db8c13e. 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/TWAI17800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4fa8c9af269ded876ba88bff800e89a692a0997537c216b0b2ff3b77f303dd. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TWAI17800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3602ba9832748b04ed919f65d64bb4fa56171cc71016539473c9c4f22e528b37. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:18Z), 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/TWAI17800008.