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 0x33bbbf2a54d2e28ffc47be604f255cdd0617d9974911faadbe9c40399d84230c. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94542ac6-a55b-497e-8f70-d4b58592ef59.json and https://artists.proofprofile.net/proofs/artist/94542ac6-a55b-497e-8f70-d4b58592ef59.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 0xf7062d90e8fb912898acde130698910d8ec4bb4af2259f65caaaa707d7c4468d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLS6R1886786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0860bfff8067db3962add50a8fdd466ad65f71a2f8be32c6d77a2af1d591101e. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:04:17Z), 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/NLS6R1886787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235832d5bcb2b13d7efc64768a05249afaf0fbb7ac6ad79f8174ffbbf29e3e1f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:45Z), 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/NL4NL2151419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d6bbacd166a3d727a5335b28b9e0d1ecdefd093fc86e02ca985fa2ebbf6f62. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:32Z), 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/HUA612103268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3453d54fe7e02b2bec3b0802c6fde1ba2662ee5ab6eb16ef80c24116b43dd8. 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/NL4NL2211420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76de688eb1f3379e37d8122ace9042b1a08ef57ebd908316e788e1369929dfd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HUA612202622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa56410a37dc75d6355ad0355bc31d295f8c66801cfcc35c37d07e5974105cb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/HUA612202319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01450079bb96ee0fdebe19ebe053d7fdfd6973f41568d1ac3555502257f73cb4. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:48:02Z), 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/HUB002300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5806f392d23408241839cfe7f988b985fd7fc5bb4bc50b46eff865b6f6025d73. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HUB002400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcaa6c08c36b9da2a150b2d2575ba1880e8fa5f6fbd5161cd9483697c5f51336. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HUB002400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673c71e64f084f692d70c468e0ce0a5b1994d5df7e26256e18729fa0a6988a9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HUB002400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba67c41ae2888dffcd17c3cfbe46ffdb52e87dd070beb0cc0514ed647ab2745. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HUB002400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c2e79c83504b4878d4ef2e2c834b43e66d0e2eb5b569a17117c61926d0534. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/HUB002400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6b2401664c905b43c6d709947807c2b272fb3b94991b6f1e45766480fca574. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:37Z), 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/HUB002500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0795b333aa2e4cd0c9411f6de45a086457f322b80442d9acde2b3cad698fe8cb. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/HUB002500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6504912440acca04784ab702b294110255b2fa51f4e62afc54de783afae2cbc9. 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/HUB002500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece6020d6eacb8da80095772f545025ddbf262e1e2d1e7b80f13a81e46fabff. 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/HUA612404188.