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 0x1b98d75881f020dc722892ddb1bfc71eb73149eee1833838023cdd5d55b3fd5c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bdc45040-0747-4ac5-968f-9760d7c466c3.json and https://artists.proofprofile.net/proofs/artist/bdc45040-0747-4ac5-968f-9760d7c466c3.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 0x5bf212bd713ffc7a7c27e0469dee619d03e165466ed010ccead0ec13a927aede. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBRKQ2379439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c35263c643d7a1c0be82c1b5e7f59749a1cd32019a48191af64ffcc52dc027e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRDX62303670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc801d1d07a011cf75e99d67d40e658ff8e48d6b3a658182da4527423d04b7d88. 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/QZS632379832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954a32a5bc5e9693c239306cda470defd5ac505ecb6372f8c0eacbaaa89bd02. 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/FRDX62201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ab458bd81e91c06d0c55ba42eeeadf1676d241c89780d124a0cf3da391fab7. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/FRDX62201140.
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 0xd0776170acbc08e450dc0503dbb686f353217817aff19c89df3e6018134e63d9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRDX62201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72af71212df1c61b1bbaaafc650a5df2c30e17e82c87da9bac20c1afc9eee6f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R2129651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f13214987592a9afbc799fe8bebe4e9cd55889191381fd6b09957b2d30d070. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/FR59R2129652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe89d465a8a5ff1ca971373f15c91fce12c1b9eb5e795db5594485eed297544. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:19:22Z), 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/FR59R2129653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f085f79798c4366b8bd4d2e5efbeae5335158cfecc4c7cf89f4c7736438800. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZH5E2050966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb31a053bac5bc4d4071793d7c0457063df6b9011e846cc5718e33ac62c23b0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZH5E2050967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6924c9c76f83665d9db761125b22f0ffd2359f64b74e6dfe52d04731ec9df75. 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/QZJRC1982598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ead9bbd647a19de798afd5db32b02c162a271b73821749f72bf14fbf5319bab. 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/QZH5E1922626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d24564b3dc5cdbfc9bad91114dad4bc8aabd9c70749ee382d9626e640ea3710. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZH5E2093350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166a3aabb765dfa639ba26299fef0541874a884aaabbd018836144948cb2eb40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZH5E2093344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87969c017dbea47495e4883e092f25936a794e2274e2a754a740159868e30767. 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/QZH5E2093317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdae11b3f1d0f9851053234282f06e6d808c1a3a91547a761e56124c5c9d9c69. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2053520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884d999f96cfd31a945531d1d9d31e2f8f78923ca7cee114237c8f01cd6b3280. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2053527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93757b72dbef6ca8ef89abbe6a9ad015884784b4b18d3c445a2e1901d9bbaa47. 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/GBKQU2053529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3eeb0217623a9dda3ac82f51c6c2383e750808e9e98a7221d1c66649aeb1be. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU2053519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2270da262f42793cff153c236faf784963346fe4b413f1026b3dcbf59122e4f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRS182131403.