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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548d3a31e2df0f40968b0bdcc4fc2cf915e576f6c4863b8e1cd37cb3f25b221. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cca29dfa-2c5a-4001-9b6a-0f84e65190af.json and https://artists.proofprofile.net/proofs/artist/cca29dfa-2c5a-4001-9b6a-0f84e65190af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blankiet Wprost Proporcjonalnie Al Dente
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec7eab7a2e3785221d83dcc47c84f9f21d3ca181fd01cdaa0c4644b8004f01d. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZMHL2399504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c22e1731f652c061464c9965b05217d53132f15cec043047b6120df2787c7da. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZMHP2398481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754ec53c1a5b8a0bc2ae6b699fb65353f164f2d08832a1cc9342f042b5af3644. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/QZMHN2329599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4d16d30c9fa59d40a0096f32c2128d3065508fb8a2da5a76479b06921c8029. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/QM42K2324901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7ddb9345ff21a22fd7b6e5bdf6beddb63efd39381ceda9fbc33891d4e26318. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZS642354527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923380fb0f9c6948e03a71699e9c2eeb566aa884261aba2614120234439efe48. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMHN2449795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1190f7f807a1026a5bcb087563e5bd80f91d35a29245d5bab8698d71aa19cafa. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM42K2430155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb1bcb96f786de15ea54f82eac249713602fa501b67e18e0939d1b419af3c44. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM42K2408766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389fad156b739c0160a4ec69dcaa8d2e685b18192afe47f713dc3751dfc37e16. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZS642486929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650f860f59789312c9e556c940dce1c05bc7c0099502596e3a61ccb1d4f3b284. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZWFN2588661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81d6b014efd384a1a5c4ec020ed4d4e4804d396201c8deeedc4090b6cb150c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFN2588662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d5eede0078fc6f05b12efaf94b7917467c28af0051a46b45315f01b547e890. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZWFN2588663.