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 0xb8f37b739e03bf0cb91f54f3f90ec27637916cc4d7b59525d5961b73a44e973e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45d09ce-63fc-4c72-901b-62d9ed903e3b.json and https://artists.proofprofile.net/proofs/artist/d45d09ce-63fc-4c72-901b-62d9ed903e3b.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 0xd9c498f637a4de7e1d1e29580b79528458e17eabb66ece7e7b0fc39af5e102ce. 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/TWK452271901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46368af499b49f058b082110e34864d1d4485e09afabf39c9ed1d70493363312. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWK452271902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9cfff6a8e98db44b909cf4948462f46735e5743fe491fad4658b0fd8a96cb3. 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/TWK452271905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb45bce0bbfa633afca5553900745b2378023e2dfed5c1a61de8b91f7ff7abc. 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/TWK452271906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b930f6aed337b4459a35650078fb8d8cf5fe3d09a5338c8865f4ab0af4eed2. 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/TWK452271903.
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 0xd5801090cd405c6125340d612db817c18703af7018d6b34b75a147bc5ef4d26e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TWK452271904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d67f00470210b427ea6a0edbea8752daaf78f6248a1440ea2f3cc99d1682c3d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA062222282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e50a35eb862b78dd1d92ce40f5beca7c593e76f33ad1f66ebbf60269af848a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWHG32200043.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e963654fddc9dab319d4a38d3e3561afbb2cb591ed4e343ca1965449e70fb63. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWKS52300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5164b05472dfd97e813d4be10e2dc5652d96c238ff1615cee895c1708c948565. 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/TWAE32401069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b59c0ccc42bf31fd15e0602093bf469b50726381eb7b03594a1567a44c0caa9. 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/TWAE32401799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b497dbec5f386b5db44a5d3397d66f2d631077ff69f6e556f772bb7a6a40965. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWAE32401800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f81e5186a2356f76cd0805df424ab520bcccc7c80ab31638fe6e721976a9593. 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/TWA532400738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d58b30704b6cb12a5c6d95f2abb16e06021aa87c0446f1175d8b301b33c1b68. 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/TWA532400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4cfcf2f9fe1ac5523814d2bd6f1e68377e5f914decd003e5edc6a890fe3e74. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWA532400773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f7f065ec9b75691117399ad161c02a9bd92bf5b6d8d885ecbe722adcb18d79. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:12Z), 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/TWA532400769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4122c42b4ccabdb770867c97ab7a040d5d06d97d937192424ebacb0794f76176. 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/TWA532400772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39338d9355df0e71e54d0729bb732514d2d4be6b695a65a6592a367dfa728d8f. 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/TWA532400771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9334ffe9df8f00eafa8e7000e6b615bebf4b30e73f70a1e0e4e793d649e2d1c8. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TWA532400774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb952fef85303db5e0f7a8e1427f3fbf0c16edb983bcba6b7eaa105163f03db. 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/TWA532400775.