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 0xa38c85f5c148ea06c92dac8c1b42eb39c87d281ea3092dba65b7b1895586ee81. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41d917c1-b92d-4cc2-9f4c-adaa845b8540.json and https://artists.proofprofile.net/proofs/artist/41d917c1-b92d-4cc2-9f4c-adaa845b8540.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 0x0b7cf1d2226f279ff208f73834fd7cde14f2709d78e808e92cd38e2b4e8a7f09. 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/SEXMC1700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc952f3cefcf670cb3eefeae4f1202b4c8d291c5a41779eaad17fab86f184e865. 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/SEXMC1700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6d605f404d81f3c086ec470494c872bc9a11246995fb5e99e8c8b2d0ce1b64. 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/SEXMC1700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc538e4f36486b58649efcc397878c1809a59913163f693bafe50191de70767. 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/SEXMC1700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa42c3c2e3240bd974a47138de49fff4ed0fa4ca9b56c3b6dced31a8875ee3a2. 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/SEXMC1700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8ba97ad2f122beb4272a1472bf64847929d15e5a770baa32712169ae25b6e3. 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/SEXMC1700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33322216f719655f2046f25dcbaf8a9e98778907e5d4ecb6a2f519cbaf58102. 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/SEXMC1700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f1a299f2b47bd95824b067576e12cdf2fbd6fc021dc4e91b56f603955a5ed6. 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/SEXMC1700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71055d7203a5df4aa5eca07d4b2392abdf2f1e8204c235c13cb5662dcad2f45d. 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/SEXMC1700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f1650b43e414eb11271f1a62d86e75e132f473e6c240fa688a9a5eeb63e4cc. 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/SEXMC1700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d341596814f23beb42daa8a9d242d2d1abc2662568a44d0c23be5b2890d8110. 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/SEXMC1700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233c441cc6736bad9e11f788a84a61bc07ddb42c0742905297ca62d541e36cca. 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/SEXMC1700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e3e3b1d36334beebb13a0244aff32aefeab6700eb0ddaedcb990ebc39a2c24. 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/SEXMC1700213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea6284149641f9ac1d3aa2979b86627cb644e5dd269bc89538e99e03600e708. 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/SEXMC1700214.
Tokpolska med Sven Ahlbäck och Mats Edén
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9605bbfcc8a725066379cac3d871c0bf1f8e0e7f8519222237f4134b4f846bbd. 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/SEXMC2400405.