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 0x1c0f10ec9d9feda5125c05b4750a0b2063d2aae2d4667b50fad9536da9a277d9. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aa52f1f-6c4a-4b02-b6c8-7a4c99489973.json and https://artists.proofprofile.net/proofs/artist/5aa52f1f-6c4a-4b02-b6c8-7a4c99489973.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 0xe95a7c9618380db074c9a8b5e5dcf66175bf3f210edf7953ca9f8bfaea1d00fb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWW2192127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69ae1eb463452f0bf21e52c624dc158c422b3b21b10c6b5c1eb175812a9cc6e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/IETYE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309923ebe4af0068d39efa28fa527692a8689a3ffc7f175132e0a521b031ebe4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:25Z), 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/IETYE2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c4da31043bafd3b5cab98f619bb255a2f70309a3f22f52e9a83e2c707d3724. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IETYE2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b9a25895bfb5abd6ccbe4be04797b7c8c1b4f3b58bdce5eb5182deb859b10. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IETYE2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3267785af4c03e2ac9e6996cd564949eb5e4523eb73ccfb8650c1d145f78ce4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/IETYE2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31e8be9918152a49cfe5b9b8e51884b9011dcda04764ec9a0be0bfc45ebd88f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IETYE2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7239330902581e5f67a58d745897610836ee3e51dcd662c183b217c9032ae54. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/IETYE2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4032522655046cdf1a855351322fc27562c9f5e810a6c341c973e30dac8c8f. 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/IETYE2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4051268e672a4c716973accd687fadee9d4352d1b0648d7c5da1a4673cacf. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/IETYE2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39ae191431cfe11e749b0f70e736833e5e2b3ef9811c63de5a98597075ee656. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/IETYE2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4c4674f502d23f58cf152cddfd8c2fb8e779519791292d1f3c46cf7ccc5eed. 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/QZZ7W2445002.