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 0xb13e8f9ae7ce937aed77bf30a28a5284ed74eab87caab9106684758c4407b705. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/879ea960-b6f8-4b3d-95fb-8345fbc85f81.json and https://artists.proofprofile.net/proofs/artist/879ea960-b6f8-4b3d-95fb-8345fbc85f81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Noche de Ronda (Versión Sinfónica) [Live Session]
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 0x7a3d961bd4adf8154ad1f867ec2b486a9d0ed2353162ffb814f498b375b807b0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:46:13Z), 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/QZGLM2485891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedca0ed461db48a4fdf0d1dddb94ec3f65883d09521c676db1d72bcad203c2a2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NLRD52352603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a5f8879f95b4a489e99b56d45f5507b44a20c7fcfa3a08837a67cc449796ec. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHZ52283983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f53dafd599ec5682916589f6e6f109f97abe25c2131e684e67525cc8bcb06b1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ32298433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd442482d652b5cbcd96bde6729165b80ad0221bd2835ff45f92b965129366ec6. 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/USB252302858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d64fb73e27b01865ad868093fbb406f89f6f874c88d386074cf47a1127f4fa. 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/USB252346909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7031ac833c25f0634257c191c654604bc3bb11138e5bc081dece5b2ab3f55b91. 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/NLRD52353073.
Noche de Ronda (Versión Sinfónica) - Live Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef477fe2d9af8c90c5ae2ff3422e947dd5e935764e1a9bcf49fcb135dd3aecd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZW9K2366952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434e5fed9ff7dc6ad2723e2be4b143f39c6790491310c98669f72835d5397550. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZW9L2377666.
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 0x5aea35bd80d97cf0b6586629cc523f9873b4d86d0907278a446aa625b4e0cafe. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NLRD52353074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58f43e1ca0a8886565655cc0ce82e876b2f915e427c6727327eb4642b0abfa6. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/NLRD52353075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6f2a4f30fcbb90eac6ae913a0e0c3b80ef3ccab15dba5fdd93bd3716e62195. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/NLRD52353077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1f6b2e32771fd8a6844e7c04822e678c9bf89dcd81c72f06fe48ec758fe009. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLRD52353078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b5f47122b29ca5337df3bd92f732402a0f78a6ff6500f4fb10e0cfb127146. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTV32492188.