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 0x8237d2b69cbeece10e5754da6a85d2ca6158018c851653633cbafb030e6fe281. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cf09e93-b776-4e7a-b6bc-c3c823d98bf8.json and https://artists.proofprofile.net/proofs/artist/6cf09e93-b776-4e7a-b6bc-c3c823d98bf8.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 0x53ca7a9c203a12c10ca09548eec46b8b7f94779f89305c49e6274ee6f21e9bc2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/AEA2L2173933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb488a1aa1da70f71d43944bdb1801bf7a3f13f52d5d966ff14539d0ce596b5d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA2L2175929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936bcb3a9c604aa341244c6b966860ccea19622e8fe82e07dfd631e88ce9ab1a. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:39Z), 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/UKXN22201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dc2b6ecb36225f25951604ef34fcc21c02da343a8232a89538044ab356619e. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/GX3Q92326732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a68c834c9676f0a1044953c9a021bda1513c5d0e668a8923c5181cec28071e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBLFP2356214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402a39ff8e3e4c46652367f1984543215fe51b7fcb3a6de3299d7a4b92954d21. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXIV82355043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e27446242c468ca8a0dd183757b685439e2bd0e50da133dc49a27ef501319. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BXIV82360571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389cc35a1eb9978ec19008ba475ee1da301cb2e7585eafc02555dce11899023f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BXIV82332784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd066e7d0f3367bd80be4592ae66853c876ac8616a84f3ddf6e9e20689fb2ff38. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BXIV82333035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf377031a15050f6f68187579f0c7444a489e61daf89e4999cefba4f920af0bdb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA2L2198015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc500b2d3c5cb02d9db2f60f6e3cdffddaea67611cdad0f556bdde4cae134dc0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:22:49Z), 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/GBMA22317766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcf4f07f85f7953a2f6bef3db83fdc2f4dd2d5c10c380001292420e6b564e65. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AEA2L2198017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1596739bd30e060bddc5c159a26ca49841e4de278c55bc8555d899e33d1f8b. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBLFP2403180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b77bfcb7bfb5aa48d052a3719c53f3ded9a309ec21a0177f99923e1f6d3b4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBLFP2436921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e2a92c943522dcfed95b3effd088850f63cc2e39d2c2381669cc455c5e468. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKXN22442272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba53b83b10c13466764520b580f7cd1ba1e845d0f62fd900e373b16e547bedb. 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/QZW9M2416896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba53b83b10c13466764520b580f7cd1ba1e845d0f62fd900e373b16e547bedb. 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/QZW9M2416896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156fb7db3bd658364fb1edc7db79bbe67ecf4d6956d5e61e97b1d34ef5c68fd. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/AEA2L2511838.