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 0x07cd6cb479bdf6803fb06dce81a9691184315b61cf99ff790fef3dd54edba227. 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/88c0cbe0-97b5-49f7-8a5b-c430a1e688e9.json and https://artists.proofprofile.net/proofs/artist/88c0cbe0-97b5-49f7-8a5b-c430a1e688e9.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 0x0c6cd22d419496bffb2036740cf2506f9873cde03eedfe8b48781eb7d8cc7579. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USUYG1344884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be659527d1b13c0eb6b3759083061a241267c6fe5441756a5672632097614c2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USUYG1393991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400a8028373d9178a6e3753b3e4e2a3c11e38df052dc114d8647d3c7a3de2fae. 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/USUYG1396407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c80ed76c755472eab8303cb483f527d4e37cfdbab1140fe5420dda2a4011bbf. 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/USUYG1431931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e5c95f274bd5d25119a979fc06d01336b9221db5296152f36e0d8935397298. 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/USUYG1450044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e9bf7fc1777c694c008e089c27d022d8bb9bc90735162e51eb9883c59aad71. 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/USUYG1464866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb097ea578e1fa13003aab40742784f98a8a8bf326fd8de18721718a2f93bf04. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/MXUM72300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198ac6ba843b72cdd46749c1687f86367e267f4c1c4732348694a1bef0623873. 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/MXUM72300647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b50ccd78a51ab63403d444f2e35856a253e2ecc386a8bc54f7f8f525d3ab76. 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/MXUM72300649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c6336ee02eb0d34dafaa7e7ccd351e939eee8bae5b1660c60c0a68e01b2f2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MXUM72300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e960c26d643206896049c33eaa920e612e8ae7121d4af4741088592ba725ad2. 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/MXUM72300648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a17a7d0ab8167d78002107ce2859bd5fa22dec0b590b55d84d9710634aa0c7. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/MXUM72301356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bebe4e923b5eb83e829220f03bedeb25e0b24ef9a59ca61de10e67a65c771e. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-03T01:37:49Z), 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/MXUM72401542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515a1a98918dd3746e68000e40d4d28b42057636294ffa2b66f086af21c71884. 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/MXUM72401543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4032c517e9aa087049aba79cd41d827fa96feea0088538d934b0ce09b4cae578. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL2288809.