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 0xb63eafa4a0d487f99178684869bbaba2f3ad749ea4849b48d3cb6b15b101c18a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d59db86-9c2d-4896-b39a-c24193b5613d.json and https://artists.proofprofile.net/proofs/artist/5d59db86-9c2d-4896-b39a-c24193b5613d.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 0x51ef640a9e899e490e19d7e0278d83bb473c015a2c6825c8a717080cba27f481. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES5702102355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eebd608722d2609d42ec623addbdcd37d2ce78fd31ba2cc367f5e927b5a3d88. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:38Z), 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/ES5702201987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bc6bed2c06a48b29e2f208598c2efba62c597eff263b4b228bf1c44a0d8767. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESUM72400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5e404a5e8f9621b0155ee15745a0eac6b43d1c979bf5310d1ce017231f35e. 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/ESUM72400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2121eeb8f8fd2713907d2c98be0b4cdf22d77b912856d6639c2a91194e945c08. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ESUM72400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc211616d5e5499adbe2cde33ebe2e266fc5436668c32f94d120a3d4900c0842a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:09:51Z), 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/ESUM72400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8275120d19a3440f8b721f355624c84323fba2007013f0d7fea1c3c83138d4. 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/ESUM72401979.
Escolta-ho en el vent (Blowin´ in the wind)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582830dada4622ea52216a1d4bdc59c4bf8aaa2005b5b1cc89b012a25503524d. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ESUM72500272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc7cd6ed60ed5e17714023fcecf77fc6f6e9a580cc7afb2400e6f28395b4113. 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/ES17D2000991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662721d402a74fa5508456a08dc964a725e22f0ecc29c30a0edcc1d7e04bf3c3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES79A1812701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b768024a00cad62a26ec9468688a587269fa4b06f533a9287b258e951d7f82. 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/ES79A1812704.