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 0x277539c4f3a2887b5060d55a1d2360a3a9714288393e1d3b79198ed194522fcb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54d6a56b-f64f-43f7-9ea8-fadaa028f67f.json and https://artists.proofprofile.net/proofs/artist/54d6a56b-f64f-43f7-9ea8-fadaa028f67f.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 0xfd55d6806528900130ac029e92d175d9fcef153f5ddd73316fc6cf3f0481ab84. 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/QZW9M2275870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b2d055fe6863a9cc37292efedae21ed1cc40b5a98d7e64316f64fd8c924a56. 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/QZW9M2275875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefe86d7e5c56c8797ba0afb2015c1f4337a2ee253aca68ee44c191cb2df987e. 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/QZW9M2275866.
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 0xe77133a42d93b0fd2218e7072ba5668b05ba52d9d639ad759ae6d521beabc9c1. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZW9M2275869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa7299a3dccb700e8490a63a588771429d4d4ea587bbf42f1ceeb157d692415. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZW9M2275874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c649322334f164ac9c1845834d5ada4f883310fc3074fb77d90ddc116d21ae2. 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/QZW9L2213105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa312194cab4127ff315e2978fd6afa85a444dc480708cb6f344d0006a07f540d. 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/QZW9L2213106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59f67ebdb9ce25e89957472e881df359eae15c92237e0763353ac24d62b1c7c. 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/QZW9L2213111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e8fccee60f61764a7d6876168da7edd04d4b5aaf268ee04561b37295c0e015. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:26:42Z), 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/QZW9L2213118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cf36b13303af5c95b22be9b42404913023eaa873c54b8e4578a05addc6f0f9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZW9L2213113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb419c78a91b011a8f8a7c9de9f24caf3dcfdda0d346559f735dce3ea0fe9a6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZW9L2213117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c2fb745ed7a948f4a1bee6886c551be902c04dc47ade866c313cac63ded4c5. 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/QZHZ51903745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca4b7cdc24d4649571b8c7ea63f01cf2adc43e5256f63448edf5e3122dbd1c5. 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/QZHZ51903747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7066fb3c0bacca018e424f418de7e157bc28b0767039cf5dc56dcc8269e4a7ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ51903749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1a5ccf4fb84e81a3f95830484c7c0ec459e021499fce32aae8800d984f9545. 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/QZHZ51903754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24253b172847ead3d0c25abf6e3aec8f081c3dd31a89297add0cb91f42b0340d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZHZ51903743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ddc5f3093d26470811a91858d2658ac2d088b80220f2b299c489094bb8d14d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ51903753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cab27529afade582730adf91d4ee308dc90b781bc3b520e273545743d6937e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHZ51903756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2d19c6431763a25595e4737d83803c7cd6058fed95df25046b5e7cf25494db. 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/ES71G2310957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6cb5a1552c7398ae06a6b8899278745db8ea284cccfdfcaaec72d9abe23ab2. 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/USUM71704425.