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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 0x38ec0cb6554c5977743d1e3e902f0b82c7382ed147267ee4266287aef0ac04b9. 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/18a786ab-ae4e-4383-bef9-c21efa1597c4.json and https://artists.proofprofile.net/proofs/artist/18a786ab-ae4e-4383-bef9-c21efa1597c4.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 0xd25fbdc3b9438d75159221520522965511c46df38dfa48eb65ecfe2e80986a74. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CA5KR2191427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499c0730ed2bf5e2a514b5e6e769db4d785ab920f057448fd22df8cb5805b99d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:14Z), 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/CA5KR2233192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5562b3942536bc08b28a80e934bee2c659bda5e68f70174357201d0c3c95433d. 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/QM24S2302006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82dc057b25e7444e722fc466c8d0e0d12cde096449ba55072d0a5582dc8f21. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:40Z), 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/CAUM82300262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c5b67b004d97864825daf704be4d1c4b4ef0db1609c48164139c803926dd4a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:32:02Z), 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/CAUM82300292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a111adedbe1d0141c070e5db153b7d7376e90c9b440497064b083049bf2e9ea. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GB2LD2320333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b281194032df07b9373512f755e130ac52d737c2012f55d9046482d3b1089c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM24S2403419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16d3f95c875f7701a54d9a63b9d07eb7181edafa9f750ed10698d8b55be923a. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QM24S2403772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf90b99097fa855c2a8119e3e44adb9bbd9e0e93114e1fb6f564596c50ddcb6. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QM24S2403770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabb76d5ada17a4f359afe77af950d83a12626a3b0bee1623ffc771fc36f7d12. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:29Z), 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/QM24S2403175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c13bf3c9d9b207396c5bace88676970e68942f1582231b331c0699f621d522. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM24S2403769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b281194032df07b9373512f755e130ac52d737c2012f55d9046482d3b1089c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QM24S2403419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dedb04b5cbbd80ff0b2a12fb06244916b2e2d56c9cc157206bfb52bbf8767e. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/CA5KR2222530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5942640e0f27485e7f8473b48b58197f0096aa173003ea50205809cec805b15c. 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/GBKPL2287993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25fbdc3b9438d75159221520522965511c46df38dfa48eb65ecfe2e80986a74. 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/CA5KR2191427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8022b8df6a101504ed4d6a7c9b17e2c3ced5d72ad0bcd31b62f358ea2a83b6b. 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/QZMHP2056235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c57e7d8d1e80928ea24824989abf31572dafcae17a07715e21b0d9d995b12ba. 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/CA5KR2271801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a3aaae33eb2b0c70ce75a395a1e9cad390c1ccbed2e1aa7045c682e965c727. 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/QZMHP2500080.