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 0xd62c6426bd90515bcac497440832d395a36c1f1e7c6e17578ac317f3e2e81f88. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e409f21f-7ac7-4518-9f1b-344499cce8d0.json and https://artists.proofprofile.net/proofs/artist/e409f21f-7ac7-4518-9f1b-344499cce8d0.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 0xdbc0608cb8564e85883fa178f6fc985cbbe1c92f535d3be148ceefcb4f52e514. 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/FRX872184699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d7d0f2f0d0f450b12eaf26bc5dfcaf0eb99a90f0c6f8330baf881ce6a14ea6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX872184701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6e3cc22e651b39baca5d8976829d1e9588dd827b5a018a3ba76de6d31c6380. 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/FRX872184702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776063e2083befc19d0ae497c2102541d08a6a1f8e21263daeb7a3a380bb91fc. 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/FRX872184704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2df65d3a92d800e85002a215705868d98b3528fc51e1193d7c3695347f4bda. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRX872184705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2012d56bd9813da1b7d9bd5a8a17ca66573e1e4879b3dc7d69e8f8f9dc21fc6. 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/FRX872184707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf314aab11c9bd28b38f5179fb9bd16c259cd671568c716c1fa22b2f7710f95. 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/FRX872184708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f29b69c8a5cf987bc3668f97eabd550368d6528b1a26339aa57eedaf642aab0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRX872199048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5880f70ccd5d0fd94b88c11efb30e16779258ddb32e98a8c1b4015b00dadfaf1. 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/FRX872199049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a785c59892b23a5eca0afa444fd908bfc7dc53c92aee94057428f632b896ed0. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FRX872199050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a01a7d21517ad822495fcb380f1d06aea1a17c3f77deafc292a5867fb502f0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX872199052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf545fdd363d55605f0d979f8ed911527afbebbc201e24521277610493e5ff67e. 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/FRX872199054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09983e215a2ebf92ca76b6ca4f7f29ec2c9fcf256db4b4f7a6d7fc3680fd99db. 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/FRX872199055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c977a8e77d4c9e6116735c525bb8a2c0ded5e68088a97786f3814cf67e657c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX872199056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7efc9af4c13491ed47a5734c6c5f022cb9e42e54f81b2ac95d7a2b4f3c3ccf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRX872199057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7679ff6deee046ea16f2b1ec2988aa537c1978a9e1d96fe55328f3adf42273. 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/FRX872181169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3508a5b417e804fc7e22e6bed187e00d7d667ec73bf316596cc1a58590c29088. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX872181178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223d4dc52e31e49d3b133212d2fdff96f139f34da50c165574d972bc9ff7a93b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRX872181195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc19a16b59786602706083c2a731befad42050a86f1ce70619dded710d90a51. 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/HKG731720363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14c965d59e1d181c851624fc069b2f244a2c5cdfc4e1e0472fbadbe5b6e578c. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/HKG731720364.