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 0x9c6b15e50ce970b65e4e7a365b4564739b1d86f265233fd6af77881dc45a4748. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/60888509-ef47-407f-9e74-63ba5fceed7a.json and https://artists.proofprofile.net/proofs/artist/60888509-ef47-407f-9e74-63ba5fceed7a.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 0x4346ac091c65cc286b2edb71b9130c5c69e0800c8ba10c58d549a34fdfc82f66. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DENM12300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bab2166f18ca51b7682c72621a76a5f89d030fff52634da06ed2746e8211f8f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:11:50Z), 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/DENM12300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f27a4e643380530ebf999cfe0c3ce460407a64b528ddc610347830f23a6d2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:53:55Z), 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/DENM12100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab7cf4babc909eba576b813ff7eb14929ecafe462c50c3c0e117d411dc1c4b4. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DENM12100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf498c3ee9e835cf9256da6602772b90baf8fad7412f71930bf137eb1580587. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DENM12100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdf5614e6d662dd54fe8eb14c92bdc0460d491de8aa0237997b13355ff39259. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:25Z), 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/DENM12100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e685399b462b32c5579b41e2078e660a9e25b420a4abfad41810325841c9f53. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DENM12100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233ec8e24727cc68d6213b5149caca3537cd92008a0d46ca57b8c0fbf0ba72cf. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DENM12100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801440cde21076ff6562fe888ef9f0bc5e46b449d3595555ad89105e81621196. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:29:02Z), 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/DENM12100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a9d1123275d721963407fc569410c2c7107a57596202f749c7df753b172c6e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DENM12100279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca0a7b81f2ce3e1989a01df473688e465dd76592db0fd3c417580f2dee126da. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DENM12100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a766e07b282c163a778c75e80fade5c98b2d51cde4b3c5987463776c19e625. 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/DENM12100281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c0ea3ef4abc0b403bee14a6979aba051deb5b03138e24a03cf8d7012283086. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DENM12100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31daf55592d99ac72f6bf79901e9b0c858521ec870c45e6b2b635a8fc14425af. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DENM12100282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f3d66072e3f00121bdbe82a6016c67b688c93fb901d16e38cd13c6aa32854e. 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/DENM12100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd1989dd6f6a2941d53f36f2b2b69727bc8b2bcfcb0cbc2cee2549448a41026. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DENM12100277.