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 0x602226696fea2a7d863ac48caeb87d992baa2d4a3223c201e63063c664e89bad. 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/23a21eda-a961-4992-9373-87b12b2ce0ac.json and https://artists.proofprofile.net/proofs/artist/23a21eda-a961-4992-9373-87b12b2ce0ac.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 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 0xf523370c8a31ae7c9cad9e25a6eb71486de970338093a78234e10f7e3c481341. 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/AUKDT2401218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84818952e7aa60a6cd2a0b09d262367562a8c99d55463a7b99e052750e54230. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/AUKDT2401219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c7d1421f858b93e49247d5c88f7a2bde61902e62b41fa42ecaf9cf55cac175. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/AUKDT2401220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126402f87c742601bb142760a140b62e76cf90b8e7b4221ea2fa992465c17528. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUKDT2401302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384cadc2268dfbb9699c45f2495af12f7e2723ca638d0025a3599839e963f0c3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUKDT2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c93a953a2e254a4cbbd13c80b75dc13a746442acda37c418df14d144e2c4e1a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/AUKDT2401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671f4d8d34c5a1364ee1a0856abd1331645d9370457ee83f8d024cc29df57b11. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUKDT2401786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccd3e9e8f147ff22d9984e9bd26c6c0083f820976b9a8b41bf18ce5a101f8af. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/AUKDT2401787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd783985f326ef21c6638c6ccb3652e12f9974908f53ff64ac942bcf9a9d758. 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/AUKDT2401804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc82754c28b92b201c8b13d96a3ced23318b24a35db9f6c080a679f1004f365. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUKDT2401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20972e48f1d9950470399ecdb28a527c9befb8558b6af79a662e707ddf236983. 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/AUKDT2401812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98d569c2a22f8d6ffe9e625654dbcca9e736df35359abfaace2deb905ecce06. 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/AUKDT2503079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b26c4cc49e96563b4bf7e32e2473ef8672806c1742af44dd56977d796ce4ec. 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/AUKDT2503082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e03cd05bd0bc60d3458876557abdbf47a6a6446fce2dd577eb2f6c5f2c800bf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUKDT2503083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e6128dc89df6f8c1f1de150f6bdecc7cbdcf55a76f7ea358b2c71cab909256. 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/AUKDT2503168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cac49e05cd72f4158dd0be8f499e581c1a7883b9fb0dbc8c6683b2ee3b0a0c. 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/AUKDT2503182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6295d292abe2eac31beb703aea64705b7a70d2b67eae2c5ac4b1ad0a993a13. 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/AUKDT2503183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd222a55640fdf9ee09e6fc0c75461524faa4dc1111e9abcfbf3a39fd80218c89. 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/AUKDT2504493.