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 0x6f9a7f6fc1924d7558d12adfc79dae3fc7001088056b0ee545f134ff6847ff4f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f2dccf5-8601-4088-98be-bd4842cda69d.json and https://artists.proofprofile.net/proofs/artist/6f2dccf5-8601-4088-98be-bd4842cda69d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nourrir les p'tits oiseaux (from "Mary poppins")
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 0xd211e5722403060b97044745ffc1d8f449a6441675c27163ff6c5c7dd3490133. 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/USRDG0910029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0b0a075b18fff8422607cb6ff057eb3e23272f3769cffe7f45e80cd3fc6435. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAM460416253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568ba90b4919f5c6d11ecd82773452421871af0325050dabed33419fef563f3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBPS81514686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567412404d172773bb8e4d0b01fa6539400ec794671091be598e058d05d21fea. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBPS81513904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6694f8f5c90bd1775a60392217796d07ed1a8c039c8f872b1dbec0a762bebac0. 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/GBPS81521105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584eacd4e751759c253671b561ec870492380ce25c70b0f9bc3b530dcd12e8e1. 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/GBPS81519817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19525b210eb9db6c5424df5d42a8f1f80963d8c0e83afd7b3acb2cbeb1718a8e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/USA371628040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568ba90b4919f5c6d11ecd82773452421871af0325050dabed33419fef563f3. 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/GBPS81514686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a80ace03c0d304d3a7eedecf3452856906d24d852eadb541de80628095e35a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBPS81517378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4ffb32ca33390e49391a7fa786848add088c380c0c1284bc959c293dbd2e25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBPS81513799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2871f579babed0105f8b836eb9fc59f65c7403949cf6bf8b16d5dc7420d929f. 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/GBPS81513763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f72cbbb84ad91d961693d601a6d184a35b0d2be51b361deefde173a5c1d22b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBPS81501161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca2e783907432d3de67834a19fcd136eb5df6153c2c7c14ae59dc9a71a36315. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBPS81513707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d89b59dd17949e074cbab2037afd10330e4e2a5d748475deb6b66a37b048e8e. 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/CAM460405427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570e4de04561452b499d38a491a7e94204f0fc5b6794b5452972fc03c1421d59. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5531103788.