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 0x542014eb8ef0b761241a9dfbd6ef38a5f182571ec1d9534665c1bf82c036d3ef. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2076c91-3eac-4346-aa1a-cab26165b9dd.json and https://artists.proofprofile.net/proofs/artist/b2076c91-3eac-4346-aa1a-cab26165b9dd.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 0xa3d2aa45f6af4814cae757a57006d3ce9f76a4852f9991064dd13b99e6a50b2e. 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/CADRF1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5beb3aed3791f0f6ca5b8823973d8149c0a50bd2f73413a52e30329b6e4d7fb4. 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/CADRF1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede91d859de840e8dd2592e7913811c2f6d9e0222840e707f73cde5bb73af989. 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/CADRF1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10a791c5855cc6bf71b4f3f628ea43947155144883c278b76d6d054982be908. 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/CADRF1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ad9c7815bae359cebb1bf380879492af56d23d922b9d53670a3edd975d1c5. 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/CADRF1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2406aee825d3da5b26f02df3b3e8240e2b483ed86ed50da78d40dbb13f290af8. 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/CADRF1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1628755d61037b6c9ae343a307fb31e7e6e37f2ef705ea722cba81e10e38748e. 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/CADRF1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa628c29775231048c2eaf98807df84a994ed9261d2a336cbc7d0a97b5e4436ff. 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/CADRF1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ae5f77f9813974057c59ba1d14958d3ac6cd72b6ee1111222b2c5cffc2967. 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/CADRF1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a7de6591431b8279e59cd79034a772d34216777866b253d4322fce21e954a1. 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/CADRF1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0de0c451569b6bb5892176a87ac93ff1e4b95f141ae8c31630cb3d60d17d0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CADRF1701003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad80ff1421354268fe69364103b166cfeced5e3f4538186ac4a77cfe4b91700. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CADRF1701007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0102c01df76446de56b6760bc62e29de062278f00239649b9537dd024330d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CADRF1701002.
Outside Looking In (Acoustic Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf33637c4846d052534f2291dc1d7e98b712b309d5c8e6cc17d2890ea92a860. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CADRF1711002.
Like a Nightmare (Acoustic Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b917c15a6e938946021be20017c5366f62fce77a85035e9ebd82d8db0b138ff. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/CADRF1711003.
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 0xb0b508e18e9013b86c7107b1689000131be1c07b06565279da21394611dd7c35. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/CADRF1711007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278caf9dd5cbed21071c5f9e6372feb7a9f60d82ce50cf2995cc732b1dc1ab2. 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/CADRF1710001.