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 0xbe4a920633adda88ad9a4016140ba9ccf5cc17146513bb873ad523308307798d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/438cb91b-a0d1-4097-91c2-c6bea5744888.json and https://artists.proofprofile.net/proofs/artist/438cb91b-a0d1-4097-91c2-c6bea5744888.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 0x1d292209de58675b36b10e34fc6c6dad0370229a63b105a46bccf37aa366e19a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:04:50Z), 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/QZFZ72203770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2ecc9f35cfd5aab6aadc0b2c338556b132c750079e7527f6b2be2f0892a5ec. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:42Z), 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/QZFZ72203771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc913a5e13434ebd79e0b56866c4bbce396fc335c42244762101c7bbdeec6ba1a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:07Z), 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/QZES92294558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45b14e0802683889c60e4a6b7e61d7f6c5f1eb5bbcee34b43237615f95e5fc7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWR2269287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9716ad864762ba9a37f166cf1ac90b095bb7166157325ffa398ca74426c69f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZNWS2259715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac44baf07b907f28315c6a86ddcea2658506208233308530746036ac9fe121. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:51:31Z), 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/QZNWX2289279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724236d34385f1abf80bc24ec3eb6e0dd8a16b474f7603ad6c61fa2ac7b1620f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:40Z), 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/QZFYY2311169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c1cfc5c761c32d99440af1d0e37c559751b41d30f5d16e660b09e4a0c5f27. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:41Z), 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/QZFYY2311174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24914a95d3a77d7a2968f0cc0d6ff4cdebdfb440c87777d5b450da432c3a9bb7. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QT3EY2543208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ffc79a3461901908774598da6f2e6c94ee650c1b27a35e38a80e522c91fc60. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT3EY2547433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baa88e01c0c2339dad52a10c1697b567b323b66d6d7dc37b1e9c054d6fe857f. 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/QT3EY2540344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76d8ae8808c8f75737d8d2b077ad6db26075a51e8f6b5ccfcf8c7470d1117e0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3EY2547435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6f8b59540bb453731191e8d7742b56f73e6c853ccd804f3ef3e10ef0e1cb2c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:02Z), 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/QT3EY2545409.