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 0x1dbede71f48f38c94a7317a33bfbc2269be25042b560f16f6178fe42954bb3d0. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9d0c06c-6265-4cd7-a1a1-4d73feca3270.json and https://artists.proofprofile.net/proofs/artist/e9d0c06c-6265-4cd7-a1a1-4d73feca3270.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 0x60760508d2eef137c30a24745f744fad4be7bfa1462fcd686f63529d6eadac66. 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/FR6F31800670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cdfa938a3ddb8ed29b6a873a1ff83e7233154e3a4a1776b777724bc37e2b32. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FR6F31800700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b0b6a505d7fb56f097f865530aa2d99dd1b02475c310e087869ef2ef1eea77. 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/FR6F31800530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9da46444f02fea3c6d45b5240556efac99391d20d1cee718c4550a5c35665b. 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/FR6F31800650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9416d37b01ff544174dfe2a22d6466e632eb28f9e253a9868a9c8d2dd325fe00. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR6F31800640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de7a82532cb35b732f72807077bf325c7cb1b2af2e5baa0d6d106225be51b7. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FR6F31800690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65028d67ecc3aed16f8f91faee0827e061a069bd52e62e74b0e16c540322415d. 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/FR6F31800660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2820ab1d93c7c9047b4d61850e50c7b98a5181373b3351edaf6cabdfe340acdf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR6F31800720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc6daa989ea8161ff85c4c11f4513cff3298d4d24b437818c2faa0b0c18b46. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/FR6F31800680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b01a5aa657f7e4aceab85403ee19e9babfdf5416cf937b5084852ab479ae98. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FR6F31800710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab255e186cf971ddd6c636e391eb0842db5d42f4bc9b53dd8d3486d0306785. 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/FR6F31800730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50312bed3cd8e0c3fa234e12b363ec212890c66656edcdd76021f39722856a6c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR6F31800740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97559323bdb42e6f17afdf8d15223e8404154ff4594aaa2d45d93f0bedaef5f4. 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/FR6F31902130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa585afe5e0f60a51397c6b501a758890c172d9d289f09106f9d3614cb89cd. 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/FR6F31801690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cc6daa989ea8161ff85c4c11f4513cff3298d4d24b437818c2faa0b0c18b46. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR6F31800680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b0b6a505d7fb56f097f865530aa2d99dd1b02475c310e087869ef2ef1eea77. 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/FR6F31800530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ca9df8b4705d9bbdc3500817e4eeb8f1f34aec7a8b7ce30a6a42a0d82ec3d8. 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/FR6F31700540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbcba4ceefe9afdb5b807a3500f2234a6042d30a9c528558e04b0e405f7b9bd. 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/FR6F31700550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d922acb92ad9ddb714dbf5d3b87571416f08aa71b9e47e2183d1762421eccd5. 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/FR6F31700560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166e4619b4a8c4d85d7d847520959bb807b7b8821205072b24e43b0ae34ad498. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR6F31700570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ca9df8b4705d9bbdc3500817e4eeb8f1f34aec7a8b7ce30a6a42a0d82ec3d8. 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/FR6F31700540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4762ccf8601f2cbcab646fed46ce0c97cf596e730cf59fa64d5cb0e7092c5d7. 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/FR9W11519827.