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 0x9d5f27becc14fbb42200503f063379a56c725f3d63ac00d9d0a1c96f505f8f6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/593a3f14-ce32-48ba-945f-b7ac4b12ca1a.json and https://artists.proofprofile.net/proofs/artist/593a3f14-ce32-48ba-945f-b7ac4b12ca1a.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 0x7a74a18c5a6980e9ffce715cb1b6374813632b7a7df8f95b3e31e75894f29a97. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZJG52223431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f00b0430c2769764e4aaf78ddb0dec32b77d6553dc5adcb32cabbed1a9a5df. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZJG52284943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ffb982eb794f3ddb0f26862b4c61a25a065add1356e1ab90a38377fcb32088. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZLL92295338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179fa30db100af4c08e88c663bfb2f04ef5aeee3f5a1aad3cec87ad0fa653e26. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZLL92320361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bea444857b9df02368698cce15cfd882e5a984bcd59398f8abf4287374b184. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNMX2368013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5810c0d5075ddec953f6931195311bde711d8d6560672179042b0b85ff864b. 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/USLD91754345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4413345aeaf20bc9ebd10edc50f4c701e3cf0d36a09f1498f0b781a08b2e1b. 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/USLD91754351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bea444857b9df02368698cce15cfd882e5a984bcd59398f8abf4287374b184. 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/QZNMX2368013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2678af166c24b88ba395f692f7759398fb0040439aa9c6758f2c965d3e98c8af. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USLD91757896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743bdd1d13372574b8e280ee828aa6d602006e024fb21c09ced154a6fdd954f7. 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/USLD91757900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf245280094e38e50c4ba5ce02ae857fa334f9e901f790b7cddce34ecaa67cd5a. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:38Z), 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/QZNMV2435584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd9aa3b7b20468bf59dc5ebd76b5b72f7849e26cb50720457ec035c0ce98c95. 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/QZNMY2409102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761780e76bc90adf65c5708ca8504439223be58d1c1653fb8ad130cc7b17b751. 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/QZNMY2409106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a42e5d345801ac70335ac6c59ccf1675b4f7cc1038a9bdb190bb781beb223b. 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/QZNMZ2446811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7be2aaeaa0a56b89b8789711aa9fd0a12ed8753e632b8079e01feca56939fe4. 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/QZNMZ2446814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ae546d654f73530002b1d9b7944554a7277c6a7bfbd392a20c1761e9ae576b. 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/QZNMZ2446816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9d6cf5449eb32bc6b3c94c1347fad44e7c76992ffb5d300fd7483694664934. 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/QZL382538407.