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 0x5eb7801849a9db6a9801aefe435ff62c2509e107dea01d6dd94b47dd5bb8de99. 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/d4c3b9a7-f202-4876-a172-993ffb5a80a4.json and https://artists.proofprofile.net/proofs/artist/d4c3b9a7-f202-4876-a172-993ffb5a80a4.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 0x56db6cbabc7ea1d2c1b57e0a6156a1fdf5b3c400f1adc5c1f7e4ce7b7a5291a6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMAAK1680929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6316af843c6626c8915b747057a5094545c4a37480cae2201dc27d1ef4420355. 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/QMAAK1680932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330933179308ed26b71800340b15c614c0d677ef7abfb2f175b10be50334e1c3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMKNX1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc37bf58a5e5cfbc6c61c36da5316adffbadfabbb3c62921d2af9c0dd0b2e26. 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/QMEU31917954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6114435298fd00d23ae9a9f791eb211c12b37638fe61e7c1ef3f6eead141bc89. 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/QMEU31917953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cc32461952b96923da5f64557b6ad6cb6d7f5c158d5dac34564cb30f2ef2a5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:11:06Z), 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/QMEU31921653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae391699d17fe39efc94342f7f3322d917b95a7c10093b259a55532c786a0c6c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMEU32114658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8898f93b54089e71ede2c6335c1cbd360c160bf7e5a5b07bbac9bfa51fefa11. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:10:58Z), 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/QMEU32114660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe890fcac31dfda76f66cf2ff5e393d4c344bee1cf2b641dd03a403427f8b6181. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:39Z), 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/QMEU32114662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77892cdeb69fce9edc74ec38b55652560712a39b888f5fc38bdf60c2c57b67. 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/QMEU32114665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842b1a002563143b6a7c25fbe05cfc3e390bda4e8f0152168f7967842618cb3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:02:22Z), 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/QMEU32114666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6aa23fd819875e40e9791e6cbc06c6e46bd4ed801260b61549224f7f6b4d56. 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/QMEU32114667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577343e9ff7420e22ea0ede7a42bffa6e391cf9bc091dc0ee097fc3743e618a8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3U82300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d997e42447b6f24d1157050de804ff4c0cb82a3c55dcb229f5a937a34cbe476. 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/US3U82300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0132fca6460686d4625aa68b1b52a2aec536cc4c62c55a3c07f1eb4d1c48dcd6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:04:07Z), 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/US3U82400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac9f873c98f487f2a029182c15b904b56d5b1999bda5e81b0097f4539a4bdad. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/US3U82500148.