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 0x7718a862ad474fd490ef9c8b70233d9136a088294f480e40b14ca651f33a4a12. 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/8c3468fb-edba-40ec-a4d1-b726dd8a1ba1.json and https://artists.proofprofile.net/proofs/artist/8c3468fb-edba-40ec-a4d1-b726dd8a1ba1.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 0x9d25fa3d29b0336678abd84fabf407ad75c4508f960b67188e02bdea9279c5a1. 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/TRAKF1611426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c308aa1ff7c3e94c6af8131cb66c55abdf3413a55250052598cb3b9744ad04. 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/QZTPX2361588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5b9fbc21c897f7a254a8fa381e5db7535afc228df2b17a1b9a002c6f1b18d4. 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/FRX762205383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58be1b060e3a184082c6a09f7ee955b22d71d3a244c051bcadaeafce9b9edb5e. 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/DGA0P2310910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19efaf0ec80bd3e326a77f46d5ccc1063686c71cb94b45afa55e7bb5f8d2620b. 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/QZMZ92307982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a1a8d5c32644e3e18b24b48bc46432abad5d7dd742521850e1784ead6afdcb. 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/QZMZ92307983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d1b7ed9461dbcc440dccfac5eb48f0bd284f03eb26906de56090e8333cf1ae. 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/QZMZ92307984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5268a9adb63326f01d20cc517f8de7f5fd611f3c19f451ead4c1948f346cccf3. 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/QZW9N2202402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84a1e525e918da8b28e63abc32889af7ebcad5accae358676d8b609bd8c122f. 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/QZMZ92307985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784d151a46b1fb94f24c1366f1dd7d876995362f19f75bb2b63e3ee71bd48016. 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/QZMZ92307986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd55f8c6f5aba80e9c5a67ef7920bb5b21ecbc38c765235e23299a333f6c01a. 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/QZMZ92307987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73845751b1952a10410010a8d6e2a2c059773f009a3222d8cef76eeb2e752b04. 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/QZMZ92307988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44190f1f599b5b886885f1cd5823d8118632cbb286ee7eec54fe22619ade4fb0. 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/QZMZ92307989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710842fbaf0a78887b19c0660c8e269b0569e3e3262c0e2696d2cdfbc34c1227. 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/QZW9L2201349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43960b3b4b8dd1eb909d2d799d383836f9bf98e50b482731c6125978ee80af8b. 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/QZGLM2338717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33266adc8facd8d89f7ac24bfcc342792ab41401a7e5ab6cd60563e1c04ffa0e. 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/QZMZ92307990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a8c9ae925fd812ac16d7ce0e38fa434f8c9741673654a2fe0dff8d08eeb46. 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/QZ5AB2439350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085ab6d1464b1656b4c2175ed63ae4f48448cae0aeb9af9d37c704f2ab4e1960. 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/QZNJY2356912.