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 0x402bb5ddb9cee050bcd395bbc2383bd90c9f38f1b05b63993b53c39ed9a22ed9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c9bdc44-407f-4fd9-a266-229dc8104913.json and https://artists.proofprofile.net/proofs/artist/3c9bdc44-407f-4fd9-a266-229dc8104913.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 0x60cc6458517b173efb69a30f3ad452811ebaa656352ebf41dd960e7a8fce4c26. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NLG661900850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33f6ce0e5ac3ed0ed945884285995e40b4bfde079554548f2d1f00cba8ed0cc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fe5d706871611c6f8d8153e54cd8a1004cb85a5575ed5e0beccb6af40ad093. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG662300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349b5c615d1dfc5bed9fd030da59fad05a8bb35f6f6cd752a7f26b0bebc61714. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG662000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991838d4dd50b36706cb48a9bda147e7abc6be5f44bf1bd2e6ba5d8fc0209153. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662000179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091e3c173c887c588abda6c201b2c6354b01604c2a3bef2ee04b8663620d1d79. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG662000180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6617fe90387be7bb49cdc2115b9788ac37f53ea3b93194e47ed73c7665700bde. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLG662000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732f63486b6390da62794d66c7be786167aff955156bb46db034410aff279fe5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662000182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d904c5cc2964545b14a200381aa6589e239bc0309570b583bcda9c4f2d7078d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661800795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe718f971a897c2b6978c87d70142d73f3b29efb530354d126911e2243d31af14. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG661800973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4e67773a59c65d82abf1863a8ae75dbe69f59b54b5142c318e858231175fcc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG661800974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7da2ce3c16bdd679fa382977dcc9d1d1d0d6f89d6c9d9e0d217ddc90cc3a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG661800975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e29306d7df19a7711d4b3bf9d803a77298201e00850f6d355a6a86e02946f8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG661800913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b0efc7fca6cc540d304a97f5325d71f32e46424d25648f38b67f79ada838c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661800977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c8ee8b325608da000ded7baf658ed0af394645fc8715e43deed37390029466. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG661800979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9865b26194d071f413b895a48f16afa0793fbeab459766d78597d3ffd329022. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLG661800259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eea073b801412fe97b489260661992dfa2dbe9e0343f201b003157aa41f6e31. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLS241700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fe5d706871611c6f8d8153e54cd8a1004cb85a5575ed5e0beccb6af40ad093. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG662300659.