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 0x41aa8775a028bf89d29f135acd14956cd9f8531275d7cf17db526b6bf676d624. 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/2bfa43a0-e639-4379-819f-909389e38d87.json and https://artists.proofprofile.net/proofs/artist/2bfa43a0-e639-4379-819f-909389e38d87.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 0x80ca04b17e2645f9045bb8decacb20893c35ca0b4011a6d85f79be497cd1145f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEUM72303118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c120fa230785c9996ebe7c7d55a6db373ce48f304734eae9c7c79872214b5c. 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/DEUM72307738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c026c3ab854eb9fc1d518bb716e25e955c3285000d1db6e5b086dc52c50bebb. 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/DEUM72303119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb521b39154c19b3d2b472c6a6bb997653225f80a5fd6e440184f72056fbb3682. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEUM72312990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb537e9c5c90d0f29f70bbcb269ff7027a49a384c6552ed4184a9a4d8a58f4c77. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEUM72313133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb521b39154c19b3d2b472c6a6bb997653225f80a5fd6e440184f72056fbb3682. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEUM72312990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde98348e9625e13281c62eba9f4142b5e5c036b3faf1608257b50da8b1cfe462. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEUM72307509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd69c49d6a36aa3f30e6c865ba5bcc90f959df9db973d47cb4f8c0f3f19981a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM72313134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70994456535d67ff2bdf5b09a82d08782a889f41caac5bd11d76b69e7df1eeee. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEUM72411533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30aacb3edd54f572445031817c7f65f634675efb33cc22ad1586c133a268c02. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEUM72410372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c026c3ab854eb9fc1d518bb716e25e955c3285000d1db6e5b086dc52c50bebb. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEUM72303119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ca04b17e2645f9045bb8decacb20893c35ca0b4011a6d85f79be497cd1145f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEUM72303118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd06feaad7a1dd96d11b34c79c4723962c5b49b5b662021c3a2a5f181a98cce. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEUM72313132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c026c3ab854eb9fc1d518bb716e25e955c3285000d1db6e5b086dc52c50bebb. 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/DEUM72303119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d2d966cefa210f3d17156e9c5f930875fb6b246a975b14e46dfb5edff708a1. 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/DEUM72411991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70994456535d67ff2bdf5b09a82d08782a889f41caac5bd11d76b69e7df1eeee. 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/DEUM72411533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30aacb3edd54f572445031817c7f65f634675efb33cc22ad1586c133a268c02. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEUM72410372.