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 0x383c9664adb6b7391a425e98e39c4bfd97f30eeab3c18ec37b5edc61853addee. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c71aca99-4a5d-4e1c-800d-ee27bc3c7ec0.json and https://artists.proofprofile.net/proofs/artist/c71aca99-4a5d-4e1c-800d-ee27bc3c7ec0.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 0xeb2e64ce7df7e3b2b8ed8a8dbf79c63744e6a64aa1bac54284b45cafb61acd66. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZDQH2419986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9715054a908f02a29a4433e2aa94397d00df1bed5b609b45261270e070b44b8e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDQH2420073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c8943d36ec601aa04f402b4384b8bdb02c882b71998035bae0d5c81c98c300. 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/QZDQH2420594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bfbd0a9e2cc64683b9caac6e8c3af5daf2f1f8985d451156cb8d72bd35b839. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDQH2444696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c721bcf8681ccaffe549f2fe758f1813531f4bc1e7974bf146954fb42a61df. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDQH2505103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb4ff26c63e0224bd5b7604795e2a6f174d198deedc26516b712bc05936c8f5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDQH2505374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90b11580b1f453b2eeb1bef9cc959e5e76dd20a03a6d99afa23b128222f14db. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDQH2505385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1729bca01b3545a56ae3d34bc4e785adab0ae9be1f1a140e973048c0912ab51f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZDQH2506098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93f4d9f197a20cedfca47c575e2be66f2c5f9e37d55412a5b3f5884496949ef. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZDQH2505386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e7b9eda003fa7d15fd6951577600072f92989b907e44fd31aaa027cec4fef8. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZDQH2505387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58fdae78441df604fb96aa8185237346b51eda535f35cc03b28b2d84790b51a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDQH2505389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c06f5f3f855cecbdfc594c9538ece83150aa646df944b7ea7c7768bd8ad229. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZDQH2505390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d0f0573156c5d5c9ea32eaedd6ce17baae6f27d3a1c96722028279aa51e59b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZDQH2506101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf56022c3037a5f520cfb648b7c7d0590214f650e9e087e007b4fe96073c410. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDQH2506102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed94f36736a11c5d697e45796b2daef953c65fd31c749e87b828b1e2a1634f8b. 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/QZDQH2506114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61b778716f5d514da0b40812ddea9f1d4a7ca757a56488daa84c27e6b3afd12. 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/QZDQH2506104.