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 0x025fd57f0c01fde9074b3bfd4312ff90960f6ffe9c03731379480ff78bbcedad. 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/d5e96d96-d0ee-4e0d-b7ba-99bad7c8b80a.json and https://artists.proofprofile.net/proofs/artist/d5e96d96-d0ee-4e0d-b7ba-99bad7c8b80a.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 0xb73f8174b8acf9f04c038ca7525075ec382425e0409829f56c723af51a90c98c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GX3Q92153626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a03161a5ee22312f4522cd5e73ba438c21d32d00e7e81c5ae9a6dbc6bcc118. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX3Q92153628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f96242bd0ff5ca0ce17fe9919b064740dd02de08968265b26055737fc68a7. 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/GX3Q92153631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe63fcda371d1466868477fc026e3ba9fd7b46f44b2d6dda8ded12c3c140a06. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GX3Q92153632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da49f490d0d5aa76f6df007d7817a784b9b9c3d332bf96a015c44e4af2c24c1. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GX3Q92153647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d2bf417f122f0f602654f50507b1fd1f160c4115f295c1cec91fb2e9d7c12. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GX3Q92153634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2296eb8be9fe0d18b07f1f3f3c048265f3c89f07aaef8c487b52db32bdcec1f. 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/GX3Q92153635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03c74e98ecbec98b032e52c9c70b32f34e05edb4e22482efacc3ad7f1bf7a4b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX3Q92153639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e82f3a328591b4ed5d4db81ee2fb85247e11d91ed71f8c0426bda880668f44. 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/GX3Q92153641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3726d9891471c0a1b5d63b6a4c1d3e64ed144a23d107c05f1584e9d86891118. 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/GX3Q92153643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86401dfb1658e2d028e4b9448c03e66dde3533a9754bde063e0f13e152ca399. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GX3Q92153644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa625702c8de59c437f4bbf07c665318754ba456875e9b358db4ff34beeb64061. 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/GX3Q92153646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5652961b4a4697ff21ca59ba56aa05ee0cbb878dc7b81f9eb1c6e0a2dae392. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GX53U2038513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6cf456746b7c0895af4a4365e4220c6a9807c25b7f16082a04c50311d9a25. 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/MXD782203994.