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 0xb0199cb69d39a5eb208e18d5f53caeda1b80b27a3924a107710cc6b8da01f5d4. 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/f37ca4b8-54b4-4fc0-a452-4d4d8a5b325f.json and https://artists.proofprofile.net/proofs/artist/f37ca4b8-54b4-4fc0-a452-4d4d8a5b325f.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 0xca583254c2a10a714b9fcba2ed4b0465b0d8d81c0b95be0ab1628c1a5e0dfca8. 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/FR2X42547466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd23a62a272b67edce91dce503ed40c32ea2a1c98632d6e817ed1dde7ee186ae. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/FR2X42561392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db7f1fc9cb5750eaad909c1bcde2f17eb6c14492f4a853a4933826e2b0b726f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR2X42570583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d4a334a92a7f50f806168aaba81af74adefae99626575840800db7a4b269e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:31:02Z), 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/FR2X42570584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2438ac2077a97d266c84547b2bf6fbf21e21668284415c16990b0272cde16a6a. 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/FR2X42559910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd23a62a272b67edce91dce503ed40c32ea2a1c98632d6e817ed1dde7ee186ae. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:27:39Z), 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/FR2X42561392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca583254c2a10a714b9fcba2ed4b0465b0d8d81c0b95be0ab1628c1a5e0dfca8. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/FR2X42547466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2f99e000e0dfe62801da5e5439c4a9e0253d5e5ccc08153fed1e2f11c19da1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FR2X42570586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189ae31ad58734f260b274c58a2417eb1c4791774dd3fc59164ec7285dedce65. 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/FR2X42570587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a95752f5e80bf09c01d9076903e9767c459ed2b456df0a5ddced27de98e65d7. 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/FR2X42570589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b8199b17d2c73f8c74da34eec7c6dd3e2467712354a093487cdd696611f10e. 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/QM24S1917981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1e74d3c10369cbe47c338ad9b2ad9f8816518151c727e17ad653e22eb06d97. 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/INUM72400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1e74d3c10369cbe47c338ad9b2ad9f8816518151c727e17ad653e22eb06d97. 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/INUM72400295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd4c6c5757cc157fa9d2241ac58824365e47287addc4440e87424f1c2b0de6a. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T17:27:43Z), 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/DGA0Q2373997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a73f6149fd2c149fb0aba07ceb88f9eca64d4240a74e5b078f3400df7f7a93. 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/DGA052492933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e4f5d2857118064ac402ae040cbf3ef62cf414f8bb272df7b766e12418daf6. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:31Z), 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/DGA052492934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0d70285ef68ee754d393896b3f76742d6a1422a5768936f1c21751f86a6b7. 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/DGA052492935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb9f71bcaeb2d282d415207258c1623fec9abf3332a7f6591e0bbeda93e236. 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/QMFME2305669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba838b578e6be6a8f644836aa236fc073dc61d95360a3c6fb9665c65bffae5. 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/QMFME2305670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad526e36ba7be83b07baeaebebfa1d065bda47a84d94826982100bcb58af8d9. 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/QMFME2360790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d12d7369822c221f21559a35d00304fbd10e67195e363ea3e40a3eadfade6. 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/QMFMF2304091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb1f6516bd21b3e7db902dae19d406a439dbfc4fb4afabe83a7a71e0d4148ed. 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/INUM72500923.