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 0xe5dca0e70df0d9f46d64357cce73468a402881182e14bb3470492e9ba85e584f. 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/b2a339d4-c927-4ab1-944e-f1654e00299f.json and https://artists.proofprofile.net/proofs/artist/b2a339d4-c927-4ab1-944e-f1654e00299f.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 0xcebfe1259e572b3fd547ab95e69d8b694c612dc74f0e8a77028fca52c63c2984. 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/QM6P42360082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebfe1259e572b3fd547ab95e69d8b694c612dc74f0e8a77028fca52c63c2984. 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/QM6P42360082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6fddbab2d23a30dd87b1af64e3713c007151f52c524e806c703e6b1beac0d5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:39:10Z), 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/QM6P42360083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85c637de757d5f934675ac59bda5f69b266ceae94489aa01cb8f3fce2066bfc. 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/QM6MZ2494626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955a065c14776cc77989363f6745a0a7943deaf4975d917221957f02a0c4cff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM7282484409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7be2ad9e93847c2ddc0274b9a7d324d3daba1d1fdd05a7b1e3f49d861c7fd8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TW2539442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d38b4ff50dfe6bb3b65cc7f13ae26dd75657dfd0c473015348121e43cbcecf3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM4TX2520134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234c5759ac93c0891acc211580975b9ad8e309184460e82195c572f17e30272. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:23:12Z), 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/QM4TX2572454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58794ce2b64826348eb810a122d18a619c2418f8b56fcfc6e0adbb6ad6166c65. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2514642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d38b4ff50dfe6bb3b65cc7f13ae26dd75657dfd0c473015348121e43cbcecf3. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:53:04Z), 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/QM4TX2520134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c25d456c94aba1efd2a969bb98a30a2775abb1d970f6062bffb9ce7fbe81b1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2489566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a397074a9091aad1b15153abd3ef5c7095c6764d452ec66439d55afd15acee5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:58:20Z), 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/QZGLS2489562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c6b4a65373604bbf8f7956eedca1a0fc01256ca4e40c059a62d508941d5099. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGLS2489563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9694f17b47c954a3242f9787aac83306345da816461b8021a45bedd38ca7b0d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZGLS2489567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d4c49d21a09ca63ced624c3b5817eed0ba63e252274b716f250d74671c123a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ92464490.