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 0x2568a9499bd49c73bbaa0956d48b7fec2f59339b55ca60c15c8786258ec7ccdc. 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/3dd44b1f-6622-447e-8ed7-b19174ceef44.json and https://artists.proofprofile.net/proofs/artist/3dd44b1f-6622-447e-8ed7-b19174ceef44.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 0x829a3691ad73624d5cb8fc792fb29b0a763734ebbf1486cfa3db67593fd39a6c. 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/QZK6P2052160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38765baf447c8fa8692f37f9409a5966123640aa8fe73a9f2d134ba6e94f0056. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZMEN2095144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5667c7a5cceb872af23415f56d28af8559163d617b821061992b70d98a17cbe5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWX2078927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01009a09091d8846cbb5d8ddc18d7f2c770c1d4ac2a9ebe79ff1a92ca849ffb. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPLR2286041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ae63d9c6f4aa3dd6fb996e4de53625381af7d096c508ddb0aa90a2f62881d. 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/QZTAY2226617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596068994fb2abe210de9371df36ebaa0482c7a9fdb8c4ad83916fb97a9389db. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZDA52405517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f43ee708b06ff669c8b69b000a1473a06592ef3ffdadacdc7dbb606167557d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNWV2434265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a792cb673334e7a3cf216c08ea01d9bafc1e0c585be4927312edd11b0ae425. 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/QZNWX2497837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451daeb7763d2c14ed1b86cba7c08553103d5881b08db0a462ef3abe8586cdc6. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZSYP2479726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf791b09fa5bd10ffd54d4c4fae4068f65374306c331c0cc963ec5a15f3ae3b16. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:31:19Z), 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/QZSYP2410647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d00d0baf01966e67ef9a6dd8afa492dee02742075df7fe87205c19892cb26e. 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/QZTL92412614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f31c1f56489da29e7ab0f940447fa448c695c59805aa7db71d9d1594fb96e0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NL8RL2523344.