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 0x2a7bddc7526df34d47df5c2a97e6e35494d4e44080f17e075f994ece35fb20df. 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/65ba44c6-769a-4f47-b29c-b82125582c01.json and https://artists.proofprofile.net/proofs/artist/65ba44c6-769a-4f47-b29c-b82125582c01.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 0x0ad3bc635f7e22e5038ed0468d90ebf0ed9d7fd0f4bea1d60e7802097803a8cf. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZES72339608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dd38511facf4639a8fa745e873dd661775527f58307a0ff4c410a7424f0d30. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:29Z), 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/QZRP52339704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45106be2ce1d7522c14cc4fd23c7475316d87c0673bad75234c7d6c6db5afd11. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:31:44Z), 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/QZTB22333344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca80b196dbb57cd6a4a8e82dea84bb449ab135a79600852e1feddb6754acb21d. 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/QZTBC2359477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd23b57f7bbfd8def1eca3813e26879437d4a61eb8986dea99f1393df5addde3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:51:30Z), 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/QZWFM2362020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7194e21a3a3057b964bad1b2b4085fab7fab2a4915e0831673e48ab15f40535a. 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/QZJG52466199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8220fc1c18448358ccf75815f55b950bf0775ae95a4b84ce2492636b344eb2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZHNB2424616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e21b707f3f9bdc4eec9e44af092725ad7066747e9fa7332cb2716737dc7b620. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNB2424618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c9301aa3e594e94bb0cd78cb735afa41a993dda325a857a24771b23e3ce60. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6M2458161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9fc0def813a882240c8c18fbff2893594e16c3ecbc8c1bde173222c06bf095. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:05:01Z), 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/QZK6G2444449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8613cfc01ab2f0ec6bbc54d6f9c1fff70deb572f6531592da6565196996a0be7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZRP52453452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039a2e5be7f20aed77b679fea5fb03e89e704d9036092ff4eebb21b0a6584e4c. 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/QZTB32405240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27c04f9951c9939924c3244b33410f346060af9d6f76446eb2ea9841be0708b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:54Z), 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/QZNMU2446418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cae2989252fbef8a6876480864b8e188a799f31d8cafe18882262d83f1d02e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFX2487485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927fb1b10a9bc82192cdee9c4f866b4cc9ebb6205decfdb12b1d90844f97a5cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ772405435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f3a9042b09307b0250d6fa84a1a9fe983d0776a5c25aa4a0c456a291da61dd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:35:31Z), 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/QT3F42431606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204907703e3221bae2f171187c0ceaebdf082c0aa9e16649f845e5667de44226. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZK6G2503643.