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 0x35ff922fb78e20f7479de50ce5146d3d3d60770320ee6b95d2b85da2136d37d2. 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/aca047fa-dd1a-481c-a029-9532082fceb8.json and https://artists.proofprofile.net/proofs/artist/aca047fa-dd1a-481c-a029-9532082fceb8.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 0x634debc670c08fb59661bcbcc76314bd881828b8dd1af04ca6b0cc333f86c909. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF410500220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739b49205b74ab4de630a332a0ad74a074defec77f9e06c7cbfb51135f23597d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ARF411400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c8c24b35cd5d371830bde9f05a3a544b7d698338e08b89e5fa053f0efac0e0. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ARF412100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f7380f470d378234d19df8b3ea9ade02b5b0614eb59ef5fde719b9871ea5bc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF412200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e58863499ad6ce461c8defecd32ea5650b6218928d0f2e2a78c108d356ff7d. 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/ARF412200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e94eedd8af9b87df399bd3b592e4baa3b740315d0dedcd211c4419fd18a795c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF412300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ce24f92834d1642c9ca229ef02075f4dcee5c5a0d483a6899517bceaa6c3e. 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/ARF411502593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe720cae19351e767dca15600415ea873380e20dbe6178b013e8ce45febe27a75. 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/ARF411400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe720cae19351e767dca15600415ea873380e20dbe6178b013e8ce45febe27a75. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ARF411400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656f58e7c6c3f672823238e8df639d00cf83572214187e1415ae257b30581391. 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/ARF412300015.
Chill out Trilogy: The Definitive Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7664bce6f467f3b5a8483d7d27bac1097eec091c56deb2274492ec2c7fc73889. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ARF410500158.
Sweet Dreams (Are Made of This) - No.On Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110bcf329740d4c24f21f52ede0cc1f6523838f4bdb21ef0c34e26374ff57173. 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/ARF410600299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe720cae19351e767dca15600415ea873380e20dbe6178b013e8ce45febe27a75. 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/ARF411400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eb796c9e89ea676b88fcab6a5e01a2c72bddfe09a6448f5f4cf71fdbdb434f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ARF410500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880ec625f350dc1e0007d52a5d6fcfe3a1b6e8d2140c8b87f6c062d8a0a9e610. 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/ARF410500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7bf6775049ff4080859324f5042aeb422a4f69a118ca2d567c68a6a4efb60. 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/ARF412100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0773e5472ac51bfbeb278c6fc303a083cdb1b8218f3f13017175a3237d4e9eb4. 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/ARF412300248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee3d1c98aed4ce8c2d56a2429ba76eee118715113dc9544b32ccd85bf39aa01. 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/ARF412400367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d746e8ee62196b9ee14a74b7c9d059059bdefb2723eccb872c83600cfa5b87. 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/ARF410400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656f58e7c6c3f672823238e8df639d00cf83572214187e1415ae257b30581391. 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/ARF412300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7bf6775049ff4080859324f5042aeb422a4f69a118ca2d567c68a6a4efb60. 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/ARF412100060.