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 0xc0fddcb802c7bf91d94b7621fbf1a0b4b14e58d61b3923c35409243c81767f35. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7bf187f-37d3-4d2a-962e-ad98b17a3a33.json and https://artists.proofprofile.net/proofs/artist/a7bf187f-37d3-4d2a-962e-ad98b17a3a33.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 0x1da9b28340688e86818b4488bc1d5039937e653524b87d0a58c6d1e682a48ff0. 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/QM6N22487346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be980fcc5a2d7f722afb73da80672098d32ff09224ee00d8643da5e3f2fb61. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N22487351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc5c7520569f527e0573dbde7b2d092f017c17a4ebec04b40bb812eb185aa84. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N22487352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa791c5a97638164e8f7172b3e2fc6321dbf70b780738f84873546dd153f8f602. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N22487355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2458b513caf1b20bf00e1c759c96ddf3c77bf041c7c9bcd16f59ec9a27a717. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM6N22487345.
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 0xc6c38ac845497c74b5cfbc9a70b53985ec79fe64607f96c2953d0a128aa67fd0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QM6N22487347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc1c0fe074ec458bc487f9e4980d79a44b11961a217f721fd79cbe705e2af2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QM6N22487344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a9e68bc6221bb80a514b1b8edbac3075842787e6f81084f3964bf28be94c39. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QM6N22487348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93719ce158888f07d41d1c87cd199b0a59e20023d9aa5cbf10fa6b8dcee8d0fe. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QM6N22487349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343917a74574c1d299733fc60ecdb8b3a42d0f17f9261126b38255a39c897013. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QM6N22487350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0306a310d432fc486fca2564168e16b3fdad62bd24beab0c2ebf3092b91e57de. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QM6N22487353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef667b5e6bb17afd607ae5d9ea4cbbb9b800c3d8d7df620e8a01b43c9988147f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QM6N22487354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7741dcc86f4809aaa453a06a794f11f0726ec4883b95e0714f0b091fda46ac. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM6N22487356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7d834af8897270a1adf25755e4cc1410e72f80097c18f52ce62a0e55d8a35. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N22487357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4819477eb8fb9cf9c4e5817a8b5719478a8aac4733ea81130b5ec697e7b73a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM6N22487358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef414e1f7fef516ded603d42fa0ef0ae884eb8002af0678030499c71e67ba53. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QM6N22487359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59e2803bf893a36443402fec08e94c57e2e6df9e48987642b1110571c65cbf0. 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/QM6N22487360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244f3c43e0401c1ac57a7b14c63ee1b0cb339050300d60ac98a57ef47e2fcaf4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6N22487361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822882146a7d80160e0f932d51cfdd3a422cf6218d5b8b5d6ca78620f31092b9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QM6N22487362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77da491c098275c752c4bdc592d0fa4a22709345be9bb5bfb0a22474c0d730f2. 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/QM4TX2106366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb3ff33c12a577bb8ac4684165ed83482c9922588556f58df2d3715737dcdeb. 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/QM4TX2106367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dac9602b9ba79fad26e0583e97e77705a4d7d5bf9066407e4475caa9e161d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2106368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5a108bbf25607d632ab56c846331d1c7ff511ceb345880ecfac4ce23bb7709. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2106373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9fbebdb02afe7ba69f5ae88f341a9f04d31a383e1fff8e1f981f511eb8d41a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TX2106375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a81f4dc627f62c78b38c2896c7598d35c083c8d456fb63d8b4fe7580186b12b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM4TX2106369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59456382aca4fde5c8808001a6f71d4a53e7356b1fcbc887fe774ec8649c74db. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TX2106370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c2d088300a596f0ddcda2a5ccc43d301fdb08b8b302b700fa3bd4aae384df5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM4TX2106371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bc96c5c346c961013b86a87e081eeaa72984b112f88234b28009c79514debf. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QM4TX2106372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863446417b7892ffb8e7108d3173ac855300853908ae22e3c56c993e0a69beea. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QM4TX2106374.