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 0xee80c7f8a6510a0330cf7f24d798a6ac43df301861d5b14d5ef44030610bede7. 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/075c06f2-5d08-4ccc-8595-3c34b5702a01.json and https://artists.proofprofile.net/proofs/artist/075c06f2-5d08-4ccc-8595-3c34b5702a01.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 0xcee76c7b900fa99662417650d0abc8a5eef65002ab85201841213403957b4129. 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/QZHN82381436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff8cf7a6e16610faa9952bc87cf3cda36f666e5d306968861157edb2988efbc. 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/QZHN82381437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f17c9849a96ec7eadc034da074e15e50a08b4d51d069a053586168a0faa192. 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/QZHN82381438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa846f149ee819c5f1f7813a2dd792f6d283dc7f4c7f4de1a2feff6da4681585. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHN82381439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaf11a4d4febd07e21f378e79932de581428d50a0599f641e725b3c7a577a73. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6L2321187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d17cf1e23d8364bcdd7e9446a03bc50de409f57bdd930ebfa8074829df6a26c. 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/QZK6L2321188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8188985c7483ca9e3ffa5e40f4cbac307405ffff33896f0f730ec9a0a6ed016c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6L2321189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66319217fe7d2091bdd6e314471aed5eaf7ed1488979409f56c107c924e18c8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEQ2340117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae754258b60c49a9769ae52083051beb90a612cc922e9575daecc5cc8e03326d. 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/QZMEQ2340119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c77c123eb113d12cb6e72c24b2300e67e386317aba6f27f3a59c5f486dfcf0b. 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/QZMEQ2340123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57816f94b09087fda329888ef9b9d8eaf03428de024e4d8c477afe258b5834ab. 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/QZMEQ2340116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef3eb16951ffebec00928233ee6cfea036008e2a4a72076afac207189227abc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMEQ2340120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c6fc482ccc501e3b7a5fdd062e9e543aa0a3e03b6a509d72616cc316d4f556. 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/QZMEQ2340122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b2a27ffe44a3afd3481653983855afbfdbf8f7f49c9f01f1183aa93e0f874f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:53:13Z), 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/QZMEQ2340121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b04ed41db4088c1d48d6b4a6ecb70d7c646496b758db0d281a30c68504d3d6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNWT2358836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e610774e280a2d3aabd04626ef2d562a9100d7f5beace5d97ef5d09b80045ad. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWT2358835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e8312bd0ad82d867d40ee4b25ad321460e2f86aad82cf4e7c347f26560e7d9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:41Z), 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/QZNWT2358834.