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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 0x133c083f6331f4673d0e7d470ec7bc3c328478ebf34b53e0851e8b311757f19f. 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/e9fc93cc-85d1-4801-9782-75c0cdeb7670.json and https://artists.proofprofile.net/proofs/artist/e9fc93cc-85d1-4801-9782-75c0cdeb7670.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 0x59eba9c775d5bfd0a3a3b6583de269fdb0c548239ad417c02c28f16289a0fc07. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USMC10401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c392fa687048534f9af41fd3ad22d498b19e42e8138c691f70e85f7431eaa7. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USMC10401159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73583b6d87ece7d65faacd06221b83c1d4388da7e816409fe5440dc4b8eced19. 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/USMC10401161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251ee15822e598e5560c01830a3a64fdc2812c94902ab18ca469449555e9f2ea. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USMC10401162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0b326082de3c357997a16e00c75b199ea96d7da7e128e2223182ba0f2e3ad5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:01:32Z), 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/USMC10401163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf63297143451d70aef0166d42925d174e2ae9586a63f32aabcd9fbe86f34e10. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USMC10401164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e171958ace20f64dcc122597bdb33bf5d404c01bce22e81179e33374413d0d8. 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/USUM71113195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c16ef0aa538f8c5b4818e4c031db08d64baa10452c08bcd89ed15d4800a89f. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USUM71113197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb101abe16a179fdea293fc4ef366c9046201aa994808c33ca1248bdffe662099. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:05Z), 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/USUM71113198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc559acb45902696b722d46159cc8cba761aada010a77485dfbb82a307382a5. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USUM71113199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c5d2f41c46bb556d7187e2047da7acf0db30e3c3a4aed984363187fe424d6e. 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/USUM71113203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d6f2af5ed48947e321b9e84f1c2405d2bed48a0f3595e14a82c85f747f7a18. 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/USY251981867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620c0aac6a251d33f465b2d89948800e67afbe8d2a19dfefa83008d044b2fa8b. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:06:35Z), 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/US52Z1200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fa3d0c04ea61aabeb145fc45e3c92d48931421ce860f996a12001077452671. 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/USA560906383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd216dc66f6a87a23f93afe15b66556d222c7465a89d22f85cde964ae782b0cf8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA370505964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d437ce30613a81016258a003fb0cf2645c59318275353f3c7f2bdc747d446d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA560958591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295aca46f7914d816af5426513e8160def4c8d8d39a5da3f28f6e71afc992dbd. 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/USA371178092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa83d92fa97554d57684f5d42e9d40ced908c36850169fd7967427b9a57e799c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QMFME1305167.
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 0xd439b0e8aea58c649e6c57b4ca85bb64c74c9c5f1f27c729cc690f51b8a5c13e. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USA560649495.