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 0x6efb1a7ce729bd6502fc7a782b2ecee54dcb265fb87987052c8e85c3042c7453. 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/7628ba8c-7948-42a6-acef-152e3ede0836.json and https://artists.proofprofile.net/proofs/artist/7628ba8c-7948-42a6-acef-152e3ede0836.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c7387faeef3f6488180b357c4bbf7a1bd6438575a651e568c82c67c98f4093. 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/QT3EZ2419540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e13a8d97fc8ef1b36b5c43ba67062ce486c192460569bda587efe8cfc1f825e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZES52508535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ef6e919dbedc1bbb9312b9fda56318d3d9bb817d79d6b16d90b971641588fe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:44Z), 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/QZK6K2507764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3069e2d042f6b1b4ad93052f7cd3683009ab609b37abcfb03919e8d50a36c1. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ7K2453034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c7387faeef3f6488180b357c4bbf7a1bd6438575a651e568c82c67c98f4093. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3EZ2419540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c2a46905b201f7d973f88a39aae0ade47fe8d41af272545f6fae8c9587b708. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/NL8RL2523040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa3c150de6ba15e5f27c46e0bfdef1d1c776a48642dd9133bac9d2a06dca044. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFL2477006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe02e1f043ceb2bf8ccfcb53d5dc2c8fce6fe24fff8ef8d77ae94f8cb4d646ca. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN72597447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e13a8d97fc8ef1b36b5c43ba67062ce486c192460569bda587efe8cfc1f825e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:32:58Z), 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/QZES52508535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ef6e919dbedc1bbb9312b9fda56318d3d9bb817d79d6b16d90b971641588fe. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:59Z), 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/QZK6K2507764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33bddebcfc7472bd66f72087bb10cc60cb2e87c6ffd008acd394ea71a64f6e7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAZ2400557.