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 0x300cc1e53f7b61698214c730b98f3474681e1c4fd010c5e3bbb349611b04ad9e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6abafc9a-b05e-41b0-87db-d6a6118d5e7c.json and https://artists.proofprofile.net/proofs/artist/6abafc9a-b05e-41b0-87db-d6a6118d5e7c.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 0xb2a99dc02358fbf3a94b673f45ece5a9934b42423c5bd3d9254f3f7a8339d236. 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/QZGLM2576434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab93635da397521e256c4559c6cac1a09f060c45dc28f02fc0a3924642e37b2f. 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/UYB282437284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947fc657e5e098eb06993e07d847f48f79479f224ba424c5cc16dd36febd33f6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9M2320879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e60e307b0ed1eaf37807833e104c894563ffe5a9e3fe36c274204dab066a2b. 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/ARIXB2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80faf7af63e33821b596d9f6b332c9d5f84c87ba6918131723ad24dc32f9e00e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARIXB2101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeea01abd9542c2684801318c1f5addf04706c4a23e601fabeb9537dd1495eec. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARIXB2101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7a10997bbb5d86cb7d9067c6dfb942c8aa205378233603264e7b7e8dba629. 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/ARIXB2101205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0867980916969cc52de6089349dc88fa19c2c3458edeb69dfc2a1b41e256c75. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAER2066674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc582a037503c6942d19d2991b88fb1705ecf0a1b6f95a7e02ea0911e1fb5e350. 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/ESA012025256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce25259364cd89b98acd7d9d57c4f9829f698b866195b508c5bfce873eed6605. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEQ2041269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f41fe62c292e5eebacfa6460f7bd6b39e98c3fbfd29782ff744cf38ff64a304. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ93L2028781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9712d82f7b3260b53c7e39e27925a52c1f230b06f069c4d12595cec5128dff08. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL4NL2023200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071f1b44d7bd3b51615f6ed14841765dd3aed91090eca19587f9877f046097f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ93L2030590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437b0d919d92f89af1170acd07b1681ac34de4ee1c814a739b4231496c56e700. 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/ESA012031498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947fc657e5e098eb06993e07d847f48f79479f224ba424c5cc16dd36febd33f6. 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/QZW9M2320879.