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 0x4c68c8d803b8aef97343d1c1399c745eff512321154fc0f7b77c5ec476a85325. 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/d232ac07-8a94-40de-a6f3-c559fb0d9c35.json and https://artists.proofprofile.net/proofs/artist/d232ac07-8a94-40de-a6f3-c559fb0d9c35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Colombia Mía: Homenaje al Maestro Luis Uribe Bueno
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 0xb5ffd80078c6efa6be55630b049a99e1d3e51ca27e28bb229aa55d40edae2fbf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:06:17Z), 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/COF019601339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03000bedcc39d850c7c9dd3472b8233b2d085541844f5c4c6aea4f08b95bcd96. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/COF019601343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa754d56eeccfacb3e83669e3c43b5fe9cb4dd3f6bfd51d6dc1f2f2b659149708. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/COF019601346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf871c09b79323e3d80ff5c0703c60a4cc43e4be7f9234d33b0bdf5fc57d6bf50. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/COF019601348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb0b5e702b5de50e7150e3e78b93c5a4f3c267646338e5cb9011f40e7db6b06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/COF019601349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b6970407570366f3874abc2944696660e379294298b2264444965aa08f13b4. 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/COF019601350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4818f21813f638b6e9e40fc7fa145b2c6793bc531ee5dadffe2b16f903f37a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/COF019400639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915bf89d3d680f03c108635c36400266b0e9b325c67139bde53c766bf57bea48. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:22Z), 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/COF019601340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba6c86117afe7cb520f1d2d12c15d14dacf15777cb35cfe43a3ab4989a4c127. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/COF019400671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd437f9e82b2efe37599da3dcdf6c6132d04362e3efc9d4aa6b7d7716c2e1ff5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/COF019601342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f3e36bdadf0606f1944151da628f904377b8d0f2c4ca1b515f344f38969521. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZ5AB1730972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef44b24ed5066ab3456ff3489fe6ded2f5f8440576945eb9fbc5801cdb9d52. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ5AB1730974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91934464431d815132c830772b9384ad73c773f5a9528259730745969712d65. 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/QZ5AB1730979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402eb35f0da24a8d8124a86ce7090559771600aa81f5f804744fa0265192aec7. 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/QMDA61590475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc520a58d394bfcd4998d1d01dedd2d8248e9cb36671b0b71b46ac9263d1664ce. 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/COC017806488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8eb23ca7869acb9e091cb43e8f273f0b96fff5143364526ff23a16215df8d4. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/COC017502971.
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 0xe623844ac7f86586a811d651f638157a7098a3d832bb3a35347155fcfa3c1cb7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHZ52094027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65a86f464002790f06adf96abc34ef912494db2ccd8ca2499def17fb71ca005. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/COC017602968.