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 0x159859d92b9329374bd5800b0acbcf382e80aa5ef2210749808a62c46a0a8811. 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/1cb7ca72-ad09-455f-becf-fd7d31d5ce91.json and https://artists.proofprofile.net/proofs/artist/1cb7ca72-ad09-455f-becf-fd7d31d5ce91.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 0x86529d238001dec0e4339b9b07ca6b5e817289422f9cf17972c8499896336e95. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:45:08Z), 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/US9CY1300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e8ea59f4a55788552463b41c29bc2465444e8489ed38ca064d1da35a32774. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX452120228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbad1667c9f4bfc26739b3c33eef99ef2f1d0e6f1aa09067ae5bcddc9b25b0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2124004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79f78896fd1b6f9c87bfb854401a7859ec400c691edbb20aa794f6945505748. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:53Z), 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/FR59R2134946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057e8ea59f4a55788552463b41c29bc2465444e8489ed38ca064d1da35a32774. 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/FRX452120228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbad1667c9f4bfc26739b3c33eef99ef2f1d0e6f1aa09067ae5bcddc9b25b0e. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR96X2124004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ab82a8f8158863a6c55da9235e5018c85e60d9165739025196f903a133228f. 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/DGA092350495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126260bb89f27feeb7f74d22d1bec9ce635e4c4592b7464e9eed2f175ebb062c. 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/QM4TW2465160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ab82a8f8158863a6c55da9235e5018c85e60d9165739025196f903a133228f. 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/DGA092350495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126260bb89f27feeb7f74d22d1bec9ce635e4c4592b7464e9eed2f175ebb062c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM4TW2465160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4632a96183c3b3be0c8b549e809937387e765e521010e41db93a3514158a0e49. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QMDA72409778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555645b9122aa50b230ad640e9843df1f0caf3babfd7a356f5eb7e99ca83094c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMDA62483784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b675044b4609538e40823796a9f3a88a83bacf31608f46eb8f5a79c592463ae. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QMDA62483788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e99f9aa7c6208d446775a03c444b8b156ec3e72057a51dbd808b2db555f568c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QMFMF2452162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdf9a1f8e6d00ded2498b6e53894ef5d32a81720097e84b1ba0e78fcd24c65d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2511927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac9017ac6871b9fce877820bbf2321510a20ee11a88e5ff9513dca61009015a. 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/QM7282533494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de80a57ccae89359b0149b0740da9103a005c45a7f5d5d8dc09b0aef4c4425. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QM7282533495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc553eb7dc5f3a118d888f73af791c9b40a1227bb91ac0cd51ff701fc896117. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM6P42532199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74895fb9342cbdf8d479eb08bbf068e9ea48ebfa9bf0dc07a065b8a1a956998. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM7282533497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4082b3899b8afebf877a9ca3845d601e8b48d012c01a67f0d90a38c8b4aea16a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM7282533502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa48d1dbc397b7c02ebd94091f0096891bd6ead6803bc97b610136c53bb5a901. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:03Z), 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/QMFME2554049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce7a4830021fadbf8152880c5430809035cbd627bed0203283f4db369fc307. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDA72096666.