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 0x41d3f3197ca24bc78a9664b5cc3ad2838c6555b68bbf196cc0fc3ea0782c6951. 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/9577131b-0a4f-4c2d-b223-8dd909a3b77f.json and https://artists.proofprofile.net/proofs/artist/9577131b-0a4f-4c2d-b223-8dd909a3b77f.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 0xe73d864f03d56c6e950b13a46865f79fce79a51249ece71085efdf4f7bb87f5e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZGLS2597743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23475d45e661b579eee3bc332463ff1403d5814c945bbacb9165320fa01e4d71. 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/QZGLS2597744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6861ea67103cc1db109aaf86b1611b38055a8ff451d6858cac85bb1e65207d. 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/QZGLS2597747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59add5f62346600d7957c6795d58f278553b6d820abc4f41be10e1da35a505c7. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZGLS2597749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf91db424a3f455b9dad5ff7a726ae9539aba887bc58c74baffdf7d28c1de4f6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZGLS2597748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0c770aa38349cbea29c1d795e9ea4200026479ac11c3391830fd8dd5cce22b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZGLS2597750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12acdc1d0e1ec345580a6623aa86d527ef5aba1060b851a1b89445ffac24fd8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZGLS2558873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5364dbe2c23d9a2f8451037a4d98670c49832ea229f342a25b959cc28b70cc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZGLS2558874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b83c9c1c99217f5572fbe67c913215bcd7f55c3fd5c6f7cdb1b7a3196e08a6c. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZGLS2558875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c5fc629a1bce5f633388888c2b5c16ab46a9761a87d1fd019ef497552c2fd. 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/QZGLS2558876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a3d8f47c3f9707bc1f01f8ccb3b389a365d4971e8dfccc6ab61d625ed70956. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNJW2513045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14681d1fd46b1f88945e4018393928ffce34d900348c2769ebe91c1f57eb3b17. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:12Z), 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/QZNJW2513049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7573f01a1b893f15947113b1524863ae71e6ea91f0ee51059644783c4359ddaa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJW2513050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcf4d52401b51c8e3d705025ec97b60d73e397a4aaf7c3d8cd951f42e20207e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZNJW2513051.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf4dd1f10f36585b2066eb7cc2d40757fb54054d67c8372be28945381a9246. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:57Z), 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/QZNJW2513052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ffba0fd6e0fd29ddfe66b82e176cf6aa577b0ad9a1b961be9c9781ad75ac4c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:50Z), 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/QZMZ92518432.