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 0xf115d21d57e7992362b404c7a2b2c310097124c2fe1525c9be6b6acc729e22db. 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/e1147493-26e4-413c-ad32-92cc5f12c917.json and https://artists.proofprofile.net/proofs/artist/e1147493-26e4-413c-ad32-92cc5f12c917.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 0x1282e498e5a57c404f6e6051bf03917b3e44846e7f5a4b06e64c57de10b340b7. 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/MYHV12202038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d77cd8393c0cc5947d6a414d99bec2b354d46b85fcef11fe98975321be4a52. 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/MYHV12302068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30edce204b9dd21a0bf1b4fa600691d6f037c1930991cab297c1ace1b4c81eaf. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/MYHV12402124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d24926f81e44497833c283fb88ad323bcb8ebfcc5bbcb79dae7b0f2e3401578. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/MYHV12402118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8a7062fe94e544d315c2f57520b621258f6971bbdd41fd77c099d359ae37d8. 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/MYHV12402112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4afe3477c7db79eea5668ac1a4938a87f8170b20f60ce933834eb4884f7701e. 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/MYHV12302084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4a716d5b0b9fb1632f4a8113c33439a5a5be81ecba67a86dfa4a9e6a53a27e. 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/MYHV12302070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b1fae45d75458b5b818f2221275f2244faf99a46ec1d976a9e1aefbce750e3. 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/MYHV12102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f13647b60da47e33138874321bb42c81e9f8a7215cbacef6669333125fe975d. 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/MYHV12002003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775f392646a63889689340ca564882c8f1094d8f7bef9e456d690e68e2cfe4e1. 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/MYHV11901995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24d915389858ed93d3906d2a2477579049470af699d334955cc2ce5c727345f. 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/MYHV11901984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49885fb0a1efc6c994a5492f4545bc29a46c9168bc93ad3ef6fcd0a76c043a23. 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/MYHV11801976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4d67e3a57e2acbc5b7f6af39a69bddb901d690832c594243746110b29f7ae. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/MYHV11701917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada2d6bc80f2dd3af8a872b276c7bc48e1018e69a19117a5cf1290c3e7be97c. 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/MYHV12402109.