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 0x0b272b5ae1deefadddaa7840ee85131e8bd1299eb35be9a25237489928f32c69. 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/a731e80a-1707-459a-acd3-b53d46ad3653.json and https://artists.proofprofile.net/proofs/artist/a731e80a-1707-459a-acd3-b53d46ad3653.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 0xea9668d2f9f2a07623547b11e8c8daab4a02c8bbc272ed71482b1a1ea646e83b. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZHNA2366977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d0319027cfd6462b0eb1323aec40f4c3e0722511f3590e7ee52e1f735c4947. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNA2366978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c54a1a0b5f93628ee5b6bab4b88ecf4edc94753c87654997cba88eaae58e499. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:28Z), 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/QZHNA2366979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406d66839e81bf81aae65ef8b036dc2c7341681b74cc053a6d54e652f8145c5. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHNA2366980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71155f8c07ae065a3ab6f9a3f1bd5b0cc9546abf649147d160e96395b942ae8. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/QZHNA2366981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab79f5b1f85b8ce4b11d7a9faaaf8fbc5e7082a6df774532462c1c61ab02635. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNA2366982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e86b8e014ec1a1c9227b1afe5d4e9f33f4a48d22939d50393679fd00190e677. 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/QZHNA2366983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06421ddfe4ccccc0b8038b83bae5789dc6850524058cab3b380b2329a81064df. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHNB2341477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b14bf02151dda2515bdadd47aa266cd1e43ac66e474a2a01465a824f764357. 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/QZHNB2341478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3454fb55b0dbfcbed640f32817ac159836ca69ded604fa8e2f14dda22242a8d. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZHNB2341481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756fac5ef87acf67639c9375db0900271d8a8d68aec07a266986522762e892f1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNB2342212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d4ea60a7671a11e329bcda924437d0e89e0bd46a18b9d6b40e624e789a4dd. 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/QZHNB2342213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb922927a97375d083062ac3f288b12faf347a720f0f417e57a05cfaf60d61aa3. 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/QZHNB2342215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4402707db29a2421ed60bb29749157b68cf178a3c726131c0d3409484f7d579. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZHNB2342218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ec5184ea023489653ec79dc901d632d3d6e96d8e80d462f210c0e0bd181e0a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHNC2322837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa808749e9d2cb6d5270a3b2d8398325ed5e93fbae903696261dca2fbdd96d0f9. 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/QZHNC2322838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f6bb64b7c717fe991eee8e21511beef53a28d331e3ab69f2ce2c35fcdf3b9. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNC2322841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a89d314866ce9eee2b2fbc4b5aec31fabd0eda6aa433705dc1eb1c8d0277d34. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:44:55Z), 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/QZHNC2322843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb079f6398454f75196996e05ad7e9d4ae293a58c470a8e11711d332b52e29473. 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/QZHNC2322844.