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 0xf2e6b1de8831a4dd6ab2d2d7ce94af556ed027131432d6e39d8c39ec1d958630. 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/8dbaf9e9-45e6-4138-bff2-c32736a9429a.json and https://artists.proofprofile.net/proofs/artist/8dbaf9e9-45e6-4138-bff2-c32736a9429a.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 0x66db9373688e262d713108b9067621d3e44b4f3343aa379dcb7cc4c9e6b9ffb7. 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/DKH752000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dce4929967337b1e5959f68f36e8e80a6f0479da192c0f7ffe9905ad1cb75f. 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/DKH752000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e6b0fa898cc2235ea9340d66d6d0f3c92ea6157d47c61d1b2bbc2d6a0cf27f. 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/DKH752000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26745d59b730020a7a24c330a98bb058ada951bc798d6cd57f24ff1ebe2b822. 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/DKH752000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1127cf1a4db5a8197fdad8b9a61a484219f7b7bda27b872c849a7b013e902f7. 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/DKH752000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecddd10f39cace94f456811c92a3ae5ced9da384963002b35c93f0732272e0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKH752000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4723c6129195740a0e26f6d5d8ceee65df6a49f7d7f09856aec104b88d6e2. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/DKH752000104.
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 0x8601217da5e665c457e1e9063eb8249a7d4fc426a67dbf1a2693fc1eb3bcb2d0. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/DKH752000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb4fb7f2a407839e8932e58b85f8581f020de283abfafa9206f5ea61145d95. 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/QM6P42489011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f181d18da281bad7bd8cfbb83d2d15172eff823845ea534970affcd7d0bad5. 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/QMFME2346684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6693fd3ace96e6821ad116d26bf8353cc1e6bdae7ef3ec606822eaa58d7f463. 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/QMFMF2378441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e861ee4d288aaa3bd62189e32812e1dc0a0da1127e4a365ad545d52c7026f60. 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/QMFME2308158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed49ff66c9e3665cc4e30a5d24105830fbb051ef6558a31619eaf16b45a90870. 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/DKUCA2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aef3b0c7639999127898342be347774aff6976bc0a15686aee99832c781924d. 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/DKUCA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a1c7101bf9403828f50dd3c1c07d54bdc721ca1e58c649b8da15a6d075a00c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKXY12100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2356b6ac90fa09ebdc7d519a862e5656c85c6f6ec7baa08f15c7a30c6034c5c3. 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/DKH751900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb8af85f25dd01acc10a20825d40bf38ced0d0be783bea5a21eaad8b9a45184. 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/DKH751900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed72026a04cf52a1b69a064071590aa21024deab49beef26b6709d4cc01d8110. 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/DKH751900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7514cf871dee17c250f003ba97ebb300312a10fa73164a8b0c9b667987da4ea. 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/DKH751900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8485b4cc3afd49809ffc9d1a233498e6999b5f5ea8373e2c40ad0878f782481a. 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/DKH751800401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a8ae13717ce9754b1245039e7dace9dbcae9143336a537138d440c2d3a35c5. 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/DKH751800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64441193326fc9400306c5f25fc27878bcf6dfaca4e65595e13a17b6437014e. 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/DKH751800201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe80fe9b996758f66e941010ef13c691b6ae790ef303d20dd1cd511d496be902. 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/DKH751700101.