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 0x0598114f0ce569ce60d1aa2d059ab7b78e54a5468237468be282b40777c2f65e. 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/5ca8bde6-08e3-4058-aa4e-e86578d19f18.json and https://artists.proofprofile.net/proofs/artist/5ca8bde6-08e3-4058-aa4e-e86578d19f18.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 0x7bba7842037e09e28577e5f7e38389efcb73d6214302efee372e73e3216ccacc. 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/SEYOK1936753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40a0e64cbc5652e352ee18df83ac18cd67c5bfb34e97a93a9b5bc70867dcddf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEYOK1947935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cde8e74915945a0211cf5073172ee202390ace83247a85e63ebbaa2568b44b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:02:21Z), 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/QZHNC1902100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d5aebefa72553fa86466cda2b69e6959007475200be5653a070df044688e7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFZ62082671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d09e456f4e18fb974d0fe7812a57ebf5d761675cebfe218e63a22285175764f. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/SEYOK2019595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48268289bbb1703e320a065527528f8dae9e9d5274c705b4ae76e55137041e53. 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/SEYOK2019596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7072c0d77c1191af11fa21bea018993f9f9c5ea646eabba00124901d574fea8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN92092487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f55ed2f2a995679056708d8c4d00f1c707af2c92e9cb6fec838ebd55de46b7. 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/USLD91729699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a61ac42d83c729ddefc98b84f1f498a750a16cdda30c7618fecb57c7303b26. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91732732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959804b08c9059f5fc99d62c3422ecd0e23a3d5537ea4efdc454916a0b66d66c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:19Z), 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/PHW012100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c757651d9014659fd6264efc65234b24dfa6c7ccf2d71c8e97df7bf255bf10a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ZZOPM2115740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f147d11686ac7811915de923808fb47b86676d7d91d8f243cb44bb9e4d9958a. 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/ZZOPM2119405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834e0cb9614ed095c982611338c87ec3aa8b1eb191a7962d7b27184c4224d11d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ZZOPM2221992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b17412a5d40b7e9f86e44170d1bd53bfe2d2cd88fbd14dd8b3292aabbf6485. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZZOPM2221995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3569814abaded69a9dda66a0a4f3e53b66ba8a9e4632fbe7efc1c4a391768ee1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ZZOPM2236492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e778e2752f57f145bbd40ee8a0f9df1e5c63ef0e819d6e6bb1627fbfec13120. 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/QZLBC2317740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f173cfeb28f4441b091d1a8088da4c91d15ec73474dcd736a838bf59f130cf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZLBC2331101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429be54ac59552ccfa998e136112bda28d9ee34be4a980d37d31bdd23dbcf45a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZLBC2322115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764d9126b1b8554895693e4e382aad84752248a62577139ec6954fc33fe29145. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:33:32Z), 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/QZLBC2508440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ca850e96d786469c6bde7f9520bd2aff3f62e8722b3d4cb3eddb5a14cf9623. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZLBC2505175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36405afdcd5680837ebe43875a2e9957a98b98c5bf6755c74bea6b836cc86312. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:50Z), 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/QZLBC2416018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df43d12a855acc4966903aeecae960ccc128918a97f23f0d9558873b2047dcb. 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/QZLBC2100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df43d12a855acc4966903aeecae960ccc128918a97f23f0d9558873b2047dcb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZLBC2100402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ec810af053e8cf08ec9d4276037ff5636a23950c80382bf6f5a1266a7cb63e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAHY2410396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55b971c95ddf6f2cabe7427c278bd5397b6c0476b55e3f1e92c33495e0f82ae. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USLD91750145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50aba2d0b06fa1e40cb3e66196f414bcdcd846e848070e88a2f4b9e6b2447a4a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZTAW2230802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aac0dc7ee61bf54cebcabf7e959cbc67630a81ebdd0096c4f604cea8a7e1b9. 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/USUYG1496110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ea15bdaab557fc7b5f45ff40749c5de9b69971c198322dfd9c2a6f170e77b. 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/USLD91741419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424a9c8694568e886beb1fe92f1ddf93a35d91426b5f781a4bfeabbd0fd59747. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZW9K2306756.
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