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 0x394db835bbcdb98b37afaf8e180d74b41d91a3322fdf837b37b4894b15b14ec2. 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/9e3a9f5c-8e4e-413e-bde6-a0b13d8012af.json and https://artists.proofprofile.net/proofs/artist/9e3a9f5c-8e4e-413e-bde6-a0b13d8012af.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 0xff3c115e641e351e1fc083681ef9c1504367d0736e3cb2d84e52fdbee7ae1a03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZ650904447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecabde0d694484a3798621d2f5305d63a8739cc88806f21c9af9eca27a830fb. 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/DEZ650904449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ce4226c113fa5f47692a3533052f069984c16bb32b4f27fc29960a7f3ece5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEZ650904451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ede7a33261ab7384ebe80e5ed2f0118fc79ee932f3a764b2d92dd568400faa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:47Z), 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/DEZ650906111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bdd5d2b549b0270b5a3ed1864e7826a7d70115e702b7e84dbf68f31429fc9d. 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/DEZ650906113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa54b3aee9e579554ec28f0bcacdbec756e9ad1c1150187a516269aeb19a57ba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZ650906115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc84e0d9193cc9968c98162431165882c760c23237ebe4f3c8e746a1c0c830. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:01Z), 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/DEZ650906117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8651fdfe2cb3d6fcec4a9e4f5d5021763ffec63ce235abec6aa8e951d315f2e. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEOV41100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2967c7ad3076d53b2388bcb6fabc14b51c14700c5c60d8a034ab56a8a282e879. 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/DEOV41100448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699a696d814e0e42043a5e4e34a070f27d9d4a0a2843a70d7c0142f196983f74. 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/DEOV41100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c87d6562dc947df3b7aa028448e0bdb9d016a9ec75c86014938ccd35e2c7f12. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/DEOV41500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004743afca7eee21cac6f2a55e0e469c63295c9eb8c0d41b6488982324ab7432. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/DEOV41500337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7bcaa785f6c9008f928ccafbed97732d51b95bd2f15b474ff266a9ea88441f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:18Z), 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/DEOV41500338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0608a357b89b2b69b0517fcc8f0f3178252d738c443e1dadc71d5db2278e81c0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/DEOV41500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dcd1e62bd0ae43711636563bdfe18b93c67075b3f7bb7ebd1431ed434b1cb9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEOV41500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36379b348e017878505612748a8819b74c6df1e355d191717963ba9541ee76b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEOV41500341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f1ccdb4ffd5209cf335b34a2b8a83709dc887964b48854357c8de3d3d41783. 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/DEZ901600775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e27e5506796d771edea08b6affbb9febe3b8f5167e8e2c6d8dc2692ae02ca86. 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/QMBZ92145573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a27df59b2fafcc29eda65089be7228ce918e8ad7821a8021f79d660866eea26. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN92274445.