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 0xa5d02c8395c021cd7396d4fe89f6063e1967b2c6c4edc4cdc7f29767a8508c93. 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/f51f0c91-924c-491d-9666-92c73991e77e.json and https://artists.proofprofile.net/proofs/artist/f51f0c91-924c-491d-9666-92c73991e77e.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 0x2cd16512a62a7716b4386d937f9ee6beb4154ef9eedcb6b2cf83123dcc80e233. 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/TCACB1424220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9577c6b64755d9077bf6b3deb2877574f716d416a695966d05a8c3d04dce5782. 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/TCACB1424226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6d423a0adec8eb33588f487e6d82fb042783c43670af04c8fa01c37272e2f6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCACB1424240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49b094454f4b3a613f4d917776a92e8dd547c96a86d1754a8664636fb59ab02. 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/QZGLS1987986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349276767f847ee5a6886138a7c824dcaa91db2c303c08f97cf94df5f3840e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS1987987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93939b17e2e7e9ca47acffcb25f556c7e0dbecd7adc64d887d75f96fea43f3ee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGLS1987991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d453ec13451ff46ed81ce195dde5e3f903654939d2c3ab82b8564fb35435c39. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZGLS1987992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a22a64abed9da677d5dfdebe1e443b70f3e0993d8d4cbd0f454583a270c45. 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/QZMZ92087551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485b558f50a33cfe0744e5f166c068840f1642a6393675a8a1eb9aae732a8109. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USDY42123237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084f3a947f67b6f13e5c831fbc7b8edd8c356f235d6ab7cff3e18f53f3221152. 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/QZNJX2132148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951b6646e7921341fc6a4b87d2488d688c39310f2f2bef013f2c541780095397. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNJY2214291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249babed40ea484f1d38d7a4908083ad20cee33ebbbdc012b86c42356a5a1155. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMZ92382022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a88f18c7370b47a4584a9b452a2e71ead05776798088ea9aee26b27a02515e1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMZ92382017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd265b60900e9f9c0403d6b551fe5cf80d675bc699a9c3fce12f096983cfc9d7b. 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/QZMZ92382012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fc6fa29e9db138a2268d5abe8e750f82f9bb112d35feea341c60d862960fa8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMZ92331823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa042db6560632a36f30f33ee1888eccb9fc5a19f133402afbd6060a90c90c24. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZMZ92371527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3099e604bf8df686fc3b92635be7b0cb5110fcfefd28b68e4fa6e14fa4a9dfdf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJX2432866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9dae923a271e63cc3f0e9c437a4328fe8e5b8d5ad4ba1c8df83234e7fb0092. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AEA3A2305470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2433b24db70271253407246121d58cd1d5a5c87f8d685a807888432c77035959. 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/AEA3A2305471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479101e022e83a0d81a90706ce78f39fd6c33f7ae247c9b65fcf08d408132cb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AEA3A2305469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f439a3b97e24a5373ac8e81dcb4d5bed623d6acaf54d77e73bb61690badfc7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/AEA3A2305473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435d5e2eceb0fdcb5a9fd63429a3007799164ced404dd263479385f407949970. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/AEA3A2305472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398112c1741295afd87e3abe061e1daf8701e2f5460962d8f5f6b4a6cb5646d7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AEA3A2305476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ee3434dc4de7d6db88a11e8b7ebf2e133652175ceef5255c38d5928cd47955. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AEA3A2305475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e86147ac5ac605f57a7806bd755962716403ae044f61f2ffa61fb72d3a64f5c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AEA3A2305474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc049f258f48abf295b2f52d4fab4a6286c6064a16c08420ef8c98909e6f90. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/AEA3A2305477.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e55af9e92ce27e9016a1caef8379bbe0bb8530a37dff495259411cec64aac7d. 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/SGB502502845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09a76482e67919e13fa811bdf7eb09ac22d5af6df4d4da3de6076cc29f9639. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SGB502503587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c3ba29e333e2f08e6c446004b580d7184bd36dad1ec245ab9947c044eaffae. 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/MX3622200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe884864fb6eb684ba717b672f1c2aaf7327dfb5439cf099b900c295ef9f26fb4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BX2M52100002.