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 0x0f72fd5b1b849787c53dde04dad5f7551846f1bdab6c47fd717ae8db6fbf1e24. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f79b224-f79d-425a-8c05-cd80408c986b.json and https://artists.proofprofile.net/proofs/artist/5f79b224-f79d-425a-8c05-cd80408c986b.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 0x485a0dd23e0682b88b9d042a524131f3ecf35a4162b324c23cdf53a9cb7c1ab1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USCGJ1572347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058810cf9b0a7de90207309f718fdb1fa723a19cafe373c90517cc1043a44387. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:45:52Z), 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/USHM22076749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395579df4ba8952c88b294c22f07a978b39d3fc79c8af01fe212e3f06d51cf3f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:17Z), 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/USHM20926248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af3680205d67d8ad060e76e5d93be6df95514a26ff08158db60152a59aaccb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM20926250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85506930de65a7de43ba2adb1bb9856b2f5e621e805f9be345632c932d3eaec. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM20926254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ddfc41e32fa2b5f8b9369cf9cec0f49a03869c04bb086f502a9b101ecbcdc7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:50:59Z), 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/USHM20926273.
Llévate Lo Que Quieras (Remaster 35 Aniversario)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fd90155818a31ad148d1fbd3d5249d9f51660f0698bda0908868d6b2420935. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USL4Q2511218.