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 0x739055507db85312c38c22b2c1b1311a5142764fb56b7a6fdcc17468e9e93ed0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/523a73fd-6349-4bcc-940e-05450ec063cf.json and https://artists.proofprofile.net/proofs/artist/523a73fd-6349-4bcc-940e-05450ec063cf.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 0x377b40e2514d5569901fc05914e921be866a1e1cc324f9d8a127872aa12be492. 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/QZHNB1972877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf902134880d7ee7e20c8c212419506ed29b92a39614e1c8de36c074b39a0fa5. 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/QZTAU2226063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ff10646f3c51a6f48365b84d6739e1da9c07558461e5056db58bfaeee7766a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZNWQ2373054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33cda8f06c957755d20a83d03ab13c77224acc61ada08a8e0e6d247814482e3. 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/QZTBC2324680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4444d314a748dbb6484f646625cd2bec2b4469df4816ffac76bcd0b144f2f635. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWY2381547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49b41b125eeb4ee9d76160fd7d0d265c68b585cc7cab1dabbcb326a3a050189. 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/QZTBC2324681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e21bfdf9329a2b252815fb266aa84292580750e064cf598d61cdc9f692abd2. 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/QZTB62302770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07b89fb178c541a409a8e6367e5b331b3904f4ab2967e8ee239251f7534a1a5. 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/QZTBC2324682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd09066c6398d7ca3ecf62d095d78a9c1b53337ef84c54cb6e16006ae90a8d57. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:02:47Z), 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/QZFYX2496150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aff089c5ace994b4a572ec0b66d8255be02b3c1e3e0b9bd4ffb6c7cacf7698. 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/QZFZ42400796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3e8e6d019ab2d9d50f34a4a1d073d40976d2e26bc6a511d79323da8281ac01. 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/QZDA52440409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8556b0a6cec1d56a7d3bddb4877644be7b4a0da384282a91086ebc1a9d220d2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZES92425372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc06174f15daae43641c58663563805fd14437fdfda048d48f1ef2eca508f0f8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:43:28Z), 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/QZHN72485804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3418ac6f9ff9e0dd9043ab6ea733a171bf5bc7491d72ef49fe68bbd851e657. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6P2419417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5267ef9cb0fe263370848529e95bd1a5d3dbb9ff82a97086fcf7b57c3a79f. 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/QZK6K2448030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4285469c0c8871a7a23c799f1e178db1303411cfa3e1cbab390e47390080c9f5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6F2464235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd259bc6e0a7e7a3f1b1278455d59364fe1dbb416bfb69f6fda5234db013dbb4. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZTAZ2471989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a4e86390033684ca757e46dd5e35f1dbf73354433f82c1a05534e323719960. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:32Z), 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/QZWFW2452786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b01ab3c12670a4fefecf23b17f005ef36405ad5c1db0b36d7be59ea6f073d0. 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/QZHNC2534856.