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 0x5644925762f9c95a5cce6e8d42fc03dc76afcd1fb0066017deb7eb6a95ad667b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f3ffbf6-d1b1-451e-83d3-88aa3f72eb7d.json and https://artists.proofprofile.net/proofs/artist/8f3ffbf6-d1b1-451e-83d3-88aa3f72eb7d.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 0xe5a68bef2f13ab8e77e2e27660160ba534a516d1405e374b619ef89caec8e656. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAIJ2449845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573b95c762a52b59652edd9dda5020674dfed50c1a5c71afa20251a5e131f930. 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/TCAII2449851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419f564042b1b695ac8cdbaff511320f60985779dbe9fa3c03dddad615d47d4e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCAII2449855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff788f48d48a79f64fd99a1cfad519be702816bd4c87743ac8290ad3976ce992. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAIJ2449860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baaaf508ff582e1f333469cb0468a3a8b6e4a41d1d4cfff9f3581c6855323e4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAII2449866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980b1563dfb2c63693e4cd2ba2451b980ae836162ae50eb1acf550a7ca8bf82b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIJ2449871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05155e6a8afcc6955734dd2f2688f2a53c4afc1e66725dde70a04a800080bbd4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAIJ2449874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc55fdc370a9224cbe1995698feb2f6ab75b54af2cf2106da9a57a1d1d79e38c. 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/TCAIM2485776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a654ae711e02ff77c7bab237bcfe8fd7720d597af3d824d6fa716d40f2812b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAIL2485778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277fd29fd88630a9784e450e7eccf320341917c8aea1aba0b38637c25aa0c3ca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAIM2485782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c800d5936f81e4316a5608589432c33fbd6f50968e6bffaab62e055b1dc3a. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAIL2485787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8806c541806e54e22a3a24d75b40b5b8524b1cd77e57a07b977d074795210a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAIL2485791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed350b14f5d571532c21f05c93f69e8e453625abd9f562a173c01a5f734b23c. 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/TCAIO2462000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fa4a6d9b60f94e4185b6cb8ec4cc4017d0fc75d37c3f9c3f689f7d17dac34d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIP2462004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c448ffbcf5414a64a9dc4c13231c831fe2dd456c4d961e93393bd7f7e54a37. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAIP2462015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b0e9267331418efcd2086b5b412115511901cdb0d000d82803a3a8946f6ff8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:16:24Z), 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/TCAIP2462020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c5e6661e42c2ca051bd46ad84238d07a8ed6ffbb316698f9a35c72f1511f9a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIO2462034.