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 0xb86ef197faa4461e33ec48a5c0b1a7df71d13d2edc0c2220dc24927748386c25. 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/2dcaa210-99b4-47f0-92e3-4379e63b5447.json and https://artists.proofprofile.net/proofs/artist/2dcaa210-99b4-47f0-92e3-4379e63b5447.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x374339fd806068246946b4502ab48c849f518170cf5143f3f1aac3af3bca96df. 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/USDY42207072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb01b8f5154869ee527eb579ade11d58d64ac910a75986253beb54435002e700. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USDY42207084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d1950e000a4b742db998f5960415cdb41fd5d28f946b9f4562b8c7de6f754. 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/USHM22218724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476cb18f8fc2d28b6a2f2a9054a223c9248ae286a9dda0a7434f03777622c2c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM22218725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa016202fc280f394bcf9ec9e350d300a920f9c6fe1d627b3503cfc72b8a8c88. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM22218726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518bb203eb320d28b0f97f613205d452156aee221acbd9cad3acd8528c6572a4. 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/USHM22218727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f060cb512b1815c764bc1529347aa0fabfb1fb0d03c1a9ccadfca1c0f4ab27. 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/USHM22218732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64afbc2a2c8417a5b1f9188252ee7b739fa2e04d65522b5c7e7b608d15adab1. 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/USHM22218736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c2905736c775d2ebbf420ebe1eaa960d810f2081164f6faad32f1ad764dc90. 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/USHM22218738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d40b6a2424dd6097b1966f27eb78d09081b3bbb3c6544e2e647909b506c8c93. 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/USHM22218728.
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 0x80d387856bea51247e41f535174df3831e828304839e66b4b2ed5a04bed58560. 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/USHM22218729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b03de6bf9eb279d2481217f303a790d49a771b207ae3cd25f7812332547bde4. 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/USHM22218730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde3a8ab1349d63990dde191596397ef0f380cc0c27b7b4cd2ab48b73dc06fe7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM22218731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72970ca45d5be681be5bdd9a615b420bc9d0004f6c768eecea76bb4d4905f0f. 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/USHM22218733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dae9d8e2627bca64ef53140a243ec886e0fa3ebc66126bd6779d5632506893. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM22218734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fb078c95fe8ba7cf27039bf9812740cb997d95e7cd45e0abe51a82083db684. 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/USHM22218735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba721cc751fd2ebbe7035e801df5c4d4298a73f550ed9329552d443d2ccade50. 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/USHM22218737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac356b2a4e2ca58df54a98248e198123c2cbd5252fe21184a0b09e227f373c5. 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/USL4R2434933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf428d76dc387ad6a8dd343b5aa69ae3aac85ff632f9888f0f153b65c0b925d8e. 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/USL4R2434934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffba9522c55752c9abecbbbf71bcda17ec8ae3af3e1d7ce2a1886a7df8b82a4. 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/USL4R2434935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bd3e0fdca52e1f9dbbf962f4a34bf56799c96b38c661b9a8d69c9cbe1d7553. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4R2434936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e9aa1619de55e90716f624d2e292b59ddd911d412c5c56e131cfb6f7ec693b. 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/USL4R2434937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765ca3c31e8b27f7272f94b406e1c160830bc87f70bbce29fd1ce09d2d19bd00. 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/USL4R2434938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2ca7876d153d1e2c3d04baaa05b9bcb21c57591f84ffccccc756608992697c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USL4R2434939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c951eb5f619756cc0de670b5c2b1b3a9656b230b21d046f2467cb17bb0ca13. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USL4R2434941.