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 0x8bcebc31cd3521fb74a3cb13004df12406dc50285f04eb7a9fc1dc23d4a5a787. 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/49998574-aca3-4f04-9272-0768cb63ab52.json and https://artists.proofprofile.net/proofs/artist/49998574-aca3-4f04-9272-0768cb63ab52.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 0x22d0f57a8560b3d79efc32c02dc4735aeb865e14b8a58485b2c9ae0aac7118b3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6M2221069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a1fbce5e87ddda6df643b1850401efbae7c5dcc9a83ab504a2676b42e0626. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZK6M2221073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eb558efbde492cb71e607d03b92b74bb5c2dd3471fe861b224e682e2089a35. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZFYY1916393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda63bf94efd3c267ffe2ce11230f53a0fc13e14d42765258af2d63a162cd2866. 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/USYBL1401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe29f0e834f4143cd622828c744b34b718ab731bddd9c2cef80e8ff58ed561e3. 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/USYBL1401452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7a8210eba9469cca6abc1e5f39801859bfa1a99141e99b5081c30a1404fe48. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USYBL1401456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8cbe0932de0fca3824958a5b90f715d3322c790c8a1fdbb33bff9ea4b5da0. 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/QZFYY1909567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4667c09f895057de62386cfbb5f1f455e3e262ebf48866cd9fa3d1e74880ec30. 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/QZFYY1909569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24aeb467e29967818d55d902ea1ecc26ce2398cbcee3fedf9a41f4e056d491d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFYY1909570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7731a5c7004dd61b353a70472b46a2d60e0f4be00b1d95816c2e02a9e4c76d2c. 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/QZFYY1909573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c566f9ef4a3b5ddd476c400395e55cc13ea5752f6af7eef51503fc46bdde14. 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/QZK6H2095189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540a24c28965f9f7ce9c78a6770d0d8c64cf6dfbe56ac83d0516c3835727a41. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6H2095191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460693788d5beda61153cad8ee1564d2b7dd4d3b3facc01d40d4b127949cc943. 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/QZK6H2095193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b95e7cbe2888e0c807b01d5e79e4fb41c5de7b0c65052ce99fca8c08d9cb4be. 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/QZK6H2095194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b5c3bc4e0898a070c08c6c8ce119e4085a05ab510eb9f4dcc5dbeb990228c4. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZK6H2095197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1bd5e579f5aa59da6d0e04185ef6b8a9249b08a6cb7ae299c8f13df4c20ef0. 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/QZHN92487394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7653aa29aa93ab4540164b754efb25ec6d3585130cd4bbf43eafa3461448a50f. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZHN92487402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678877700016bebc28562db9f3a892cc14f67f52093df18a7aab51be29efa03b. 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/QZFYW1959816.