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 0xd59c915d3698704167a905d598977813c5fc6f686416eb3b9ecfb94eb465776d. 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/b43e8d5d-97f4-42cd-a415-aad76e3cb1ef.json and https://artists.proofprofile.net/proofs/artist/b43e8d5d-97f4-42cd-a415-aad76e3cb1ef.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 0xe734654df9699307c75a33ffb4d795be429ed7610dec101c269d8eca758ceb9a. 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/TCABE1214130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39043977b048c4023adab25cc21a0e3e17213e49fcbb2e2ffb523ba347372d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABE1214131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf268f5acf7fbc4a5d16db3cc3d0b3cf99efb75783064c38eb22d143fa7d339f2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABE1214133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247bddeded00a27cde6a16dd0e4f4f10a4f4e8e54b0e9161c2f22b54a56626bc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABE1214138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd15ed69dbd68cfa1ba3561995b205ae994a7f89084cb5255b51e2166bd9c5f. 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/TCABE1214139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feac57f3901d467ce1f44d29208aee98973ae2d8f9fd83978ea3a1353cac501. 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/TCABE1214142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef404a665f6b170f0b581301ed14a692cf413e5c94c1a1f0e4a39b9db39e0c6e. 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/TCABE1214145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd02ee717a09ec748b1e7ad38d086259bcbadf120fb1d7bdedfa2d8911e9cd2. 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/TCABE1214146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4f66296fbf2099dbe605f13f175160a8d345c391a14cfa62f0200b2573f41c. 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/TCABE1214147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc79c4c3540edc8a2e09c00e6fad75596f0abb6987497616e7a678d6cd10758. 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/TCABE1214148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13738c7a7006b8b7348f23d82ef62c20ad69519f5d24b04a628c85c97a4e8479. 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/TCABE1214150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7b02156524b9f0555a8636db20bfb3ec66b808df26a2eba32d65680dd963e. 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/TCABE1214152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1224efe4c01c814dd2c83cf0eccf9452fb34fc27b592230f4db195a479708b9e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABE1214154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce24c65f34ef260b0e3fa58ce4c850ed9cb4b4c9feed7f8d78aaeac8119f5a9d. 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/TCABE1214155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2d02d6baaf4bdc78ebbb52aec320218ed961b4220996dbf57f878e03fdacec. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAIL2430412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b79ea26b3afb89cdf50d519b8911aa9ccf3c50c5dd8651d78b9e072fcd0583. 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/TCAHK2327792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fc729a589568b26a15835d8281985d353967135bdeda146cde64c3664867da. 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/TCADI1742291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd0a4b01b18e803ce545c4ddba249fbf88ab4c87820b9392cb64cd94e60058a. 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/TCADI1742315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd796b5e2eb731d3a424337f1fbd71224fdf08b8e9afc6e6d2e37e88fda549be7. 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/TCADI1742342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbcbdad29005c24c55c2ece28b5ba90d32af728f8ae530e869c7c9217473137. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADI1742360.