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 0x536898b9243981869ea721d08efd6a1ab11dd6cba264bbbdd5e325c18ec9e253. 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/2541c442-57ce-4afb-b4b6-919c954e4514.json and https://artists.proofprofile.net/proofs/artist/2541c442-57ce-4afb-b4b6-919c954e4514.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 0x7f0a4963976215ee6c27fefbe1ebe025015c93026591af450479888225a7ef78. 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/GX3Q92166774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb7649de4bac8a20442c03e71f96d67c6026cae1781448dae688508e161198f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX3Q92177661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782e79aeba8fa3f6f3f37075a48c049189b6d5a9e909e3ed24b1671e39194e0d. 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/QZ7ML1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da9574d36ce203fe5685f6988d288c1ba4b1971aa29d4c3d8706b3fb0988c5d. 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/QZ7ML1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ca91a2ce73d536b929d86d8403824fe9d5be87629f234f185cdd0c2ef5354e. 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/QZ7ML1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f30947ac9c6756b0766302d961feee8037dff010d5085da31dafdb63e90ee8. 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/QZ7ML1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2072275a7596748f412ed3405b51538fd6a31c4c3cdeedfc7be3839d108b0776. 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/QZ7ML1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a3308632e5879922b857761d199efb32beac85f6026be17b0bc753832c4ff. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZ7ML1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8fa30750e5004022de18c9c8bd69969b36221c230ebab45d6b92b504cbc728. 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/QZ7ML1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75727f8983dc077bacb49bf2d23564b919157f203cbbcce2565a2bc7870eb31. 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/QZ7ML1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2767c9795858241372c2860794190549931dff3fe842fc3928b9749f7c5231b. 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/GBMA22308444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447a7f268b9c7c40846eac5d7f56af78f119f05b6ff0c2ab16d06eadeef746ba. 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/GBMA21410939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc985b06396d11cfe1ea6e5ec5e9d1696c3761903854acdf32bd7df5c9ffd0eac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMA21410940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43b1799b8cc293f515434434e28f900d2fa8fa69146f50c80200b28eab9a5c9. 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/GBMA21410941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0848ba2b9f3dffa025e5e3f4c212f1c41bda53fa5884ac29e590079a9f69bea. 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/GBMA21410942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fd9ce5ed904546a85b15e530285cacdcc2308d0036f956ad5cbd8733d47b42. 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/GBMA21410745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc82414e8d6f38a83c3813b7724a6a5a60d3d8f569482cb4f552a48820e80725. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMA21410746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6379a91e203df513d465b9dad00a14936a2c53dd26165eb9dfdd88c33798e5. 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/GBMA21410747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756724283da485ef2a168f198bae8294992fd257efa5aa354e967c2f730de1c9. 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/GBMA21410748.