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 0x2c23cc1a6951cb2340eb55e0efaedef19295300dc29969d7b7747aba659cd903. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ad84ca8-3e35-497b-98a6-7770b731891f.json and https://artists.proofprofile.net/proofs/artist/2ad84ca8-3e35-497b-98a6-7770b731891f.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 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 0xe6a2a4a605568d1116e93ff606bed11a995b367ffab43cadb5c4715f0ed05223. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/AUZEM1801249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f128036d2a6b5df5ac9aefe2d5bbe445e4c23b62af674ea40507fbd3e5649e. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/AUZEM1801250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645619f2f8437689d9832b27aff09a25e648dc432da9f11f505d81f4af94124f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUZEM1801251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf646e231eb4084829e840440bdb36e969a1b3c2ecbaf7e325f18f47d3d9fedd2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/AUZEM1801252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b3e31d27d9f0c8c3e2d7b61edc9568d5df6a5d883d79f590a94b003eb3e408. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUZEM1801253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b11d98423cd5c4d4c3ae96d35770e24d92fc30926064af18003804befe2e72. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/AUZEM1801254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0537e7ac1ce6280e9eb62f0e9694927b8994c2d541557bfc7c4e103e0b9d47df. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUZEM1801255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4573e241cda866f8202f387437eae608ddbab3019768d1384bba13344939a5. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUZEM1801256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19d49667970b79ed834bcf1079b2c77860cd1eb2f6b43c75365cb8fd4bfbd2c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/AUZEM1801257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7d3a4e61184b0489f0f7d7531f45e44fd4cf892d6cd19e19bcd5bc16ac7d9. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/AUZEM1801258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bb5d2168e0fe2f604dd9225b35fb720238d038c123727949f909309495dbc6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUZEM1801259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513e543deab87535774cbe50c813f96287b311ba754a6064dd5694aebfa79d2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUZEM1801260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1366c2d3b35149d01ed28b0ba3957e20dd045099592e7772976fa4e3b236e9ae. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUZEM1801261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3f55b3e1999b2871e0295a5ccdd054dc655ecf6e2b5b0785f109636e27a141. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUZEM1801262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1ac3607b34871e096e1fa79adc779c2e2d365fbf0cc96962610056eeb1f861. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/AUZEM1801263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b692af1c59b0d26361b8b7e5cf5aaa9264fd08aa24b425d6dc313562bbb70c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUZEM1801264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f25e6134e93033f91f847565ffa377067f4d578ef3db5c97bcae2042a901440. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/AUZEM1801265.