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 0x620186ed663d96dfbcd4067a5f09c080e1b96ecc55ee0d1d664ece6e7548a6ed. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1373bde-5150-4011-bef2-ff2aa9126cb2.json and https://artists.proofprofile.net/proofs/artist/f1373bde-5150-4011-bef2-ff2aa9126cb2.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 0xe6f7e768945d1d1d582d88fae28040c826376fc581a1d0c9a8b99cb21e747e24. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBMA22394099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88b4170b2bb76573e3f4c58879749b754c6eb8028af56ba2438aae28f069737. 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/GX53U2324980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaccf5791fd8a37bdfb7adb9b0d481505314cfb4c5c31e4a18fc52edf93d55fe. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GX53U2324982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c5632135796110708341201aea513ee486b52c85ae6ef8142f15d0a99ae47b. 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/GX53U2341557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4757e180afd779837fd478c82d3ddf29c6d21964c2fb626cb59fd033edd5d298. 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/GBMA22359937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eadc195fa451e6cb422ce483e2c4d3d15321b301d0ebde71e6779dd15a569dc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBMA22482355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ffde4d87d08899cc00316d006d0375ab84ea8828141d8dc55187b7f278b31e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBMA22455758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb22a4d65d20d469ef2a79b77aa68df46fa8547dc832fb6ddf05004a57d0915f. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBMA22432644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5a3ee010481270aea0db978af344ba1f21c375e0fe5f29911c1fc9f1410ea0. 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/UKXN22486622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8fd402f1dc7cb7d593a863393fbeda810d899b28098ded39f54f67857860a0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GX3Q92497347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0901089990ec9130747b27c8440e1869cb4ae9e373485ce6d119cd6fcc5a8bb1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GX3Q92402665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9fd85655eaebaca78ba68acb1dd8712ee01f5b084b7effc1b5a6d48c5b63fc. 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/GBLFP2477136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5628cb2c83856ad385d71e25bec3547b866b6c3d2dec5927cf6648c1fb0f7ab0. 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/GBLFP2417507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dccd15c9701bf0718137b8a7f66bbfe784e59371772598032d7cd7c3655b04. 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/GBMA22326557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30fcc4ea26d67fcc6d6ec7aa5ff034714b58368ff8ca8ea9401cc3f0d50b834. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBLFP2398713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de439a15792149b90639fc6a4c312d12bd5a543d3a1d883bebff6ae8d4c3c0f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBLFP2360439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e530e34e51b03cf2fe87f8eb04298923d08508b0b062073851d743e251636e. 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/GBLFP2335336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb166111c2f86073e15a5b92d755bf04344013d5383747091e75c8781d7971746. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLFP2325517.