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 0xc524124cd344a7d937ddb8bfc88ce2d2490724e1d5e974bb052bbbe3e7e60b02. 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/708b62b5-2752-4695-89b1-85b9a9481652.json and https://artists.proofprofile.net/proofs/artist/708b62b5-2752-4695-89b1-85b9a9481652.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 0x19fdc7e889f9aed00683ff672641841995dfeb4f396d70d0968fa8a12642de25. 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/CAEH11300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dd2cd52265a869ce71c8429544c6bec0179efb7ba3a02571f2d85568564150. 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/CAAQA1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe012a0aba78cf631f499cf1f1b6005ab949cae16a91c2062313c94cc5fc8198d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CAAQA1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9240fdf99d042be1e32826f74e9118b8c1f057f82c722ba7cb2326e89823bd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:26:14Z), 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/CAAQA1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772b4bdd0e5942532a50e7d7d23b0cde3218b87cf1752a8a7b7bd77ead21eb01. 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/CAAQA1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1b5ca4927ca2d5ac86d411cc07df97675c6be7dbe25db49cef8c6941df47d1. 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/CAAQA1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5bc49b91694ca023fefcfc6c8cf0011b555e26c873dba099d62c5f4c0b10a8. 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/CAAQA2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652cf436a90a15b86e99193d94ac8647a77a41354f4704adcaa1d85e97a50b4e. 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/CANRM2200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139891e1f58f66e2fe524dc2a3baea6f52f0d6475d68fa733c610ba9736f44a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:48Z), 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/CANRM2200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57155c47d70937ad623244cc50f96e908e321ad240c1efa4de82cb483a2e258d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CANRM2200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf139891e1f58f66e2fe524dc2a3baea6f52f0d6475d68fa733c610ba9736f44a. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CANRM2200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd59f48e8e61cefd5405b8617d8e8e993ba1c7ff223c185f4938d4e59774f63f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:50Z), 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/CANRM2400384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef10470c59bf57c032a8d9c18eac51180e3ac626c4d6783e5fdd10c3371ad10. 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/CANRM2400385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea4a8a355e0ed94c274a06af811133288a366cab68c72fa8782d70a3f454dc7. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/TCAGD2239966.