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 0x94a6f359b70724f83fe2e2f2e59aa9b184ef16af2f15aa40806a589d528d115e. 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/df63754d-6d52-44f4-b3a1-721c15729ddd.json and https://artists.proofprofile.net/proofs/artist/df63754d-6d52-44f4-b3a1-721c15729ddd.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 0xf37784290ca8cfd99359f04cc6113a26e694940dff24c808598fa6ccc0dc289f. 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/CACEB1761558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7f06a21a2b9376237f9fce7a78ac6eb16b75c854c05526aecc3d30d4b2966c. 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/CACEB1761561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820d7bbf236e509d6f1662427c89743eab09229324631bdcd156a70bb15078f1. 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/CACEB1761562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7f3b19191fed9cfd8c2922705a9c00495e1dba2e9ccd786c0a4914b133c3e9. 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/CACEB1761559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a79c7ba3f6fe47a8cd5a3ed9fc584460310bfd281b2d85ff711189fb4e1419a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CACEB1729915.
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 0x401276aa3498d229acff2b6874a2904c5f071ba39257cc15d8262b638280ab49. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CACEB1700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4ba00fcfe92fd34b8304819c5d4aeb6260e6c981648d77aecc4da879968341. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CACEB1729916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6bf22f918a1de8ab43bcfb1dadb5abc3b6578f6a1fde8764d76a9d59f973e2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CACEB1761563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ffed865bf2ad96346c5ecfae649a4f5a58eafb93aeb6214fa1d00437f0233. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CACEB1729917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b559fe5b906318d7f27f49cfe94b86be5b359291dc8b2f75d3b24e6839e8150. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CACEB1729918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47b0697cb0c6eba9703cf09152d52c53c88dde6c46417082eb0c6bd89e0bda8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CACEB1761560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc3872e47e0d8a87833c48456b99b41edd3a64e89b6ca058961da9f70a3005. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA81K1500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3bb7d66f56c3114e6bc5b80b3f59cd556238d16b319876d5ce96b2d99605db. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA81K1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff054bf34c179e3d1bcb1647398911da04e232bfa90164033067b2ca5fd96e25. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA81K1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a72cfd87f85c2894b80eaf792daf0f7eb7bb7d14c9e6fc7a2afb7d0b26c40. 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/CA81K1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a2ab0f3c1c295c637ee9c47370b9598082f5b1c197a59bf1fc8ae8a945a916. 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/CA81K1500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60363949d6c79ae484dddd4acaf9792f2f7a98a888da933b55a32d29bafb368. 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/CA81K1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcbb30b7b475534a3717082b8115769de8a68d2f36b3576c9ab5ea6b4680a3c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CA81K1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebef2a24b231343df2794fd74238d217b279a94f8988ee4bac7b167d16c4dd72. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CA81K1500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e123b75dcdec0d8dcb307a2c1c215de3fc20783d4a05fe4213599c5174f250. 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/CA81K1500021.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d4dc8d71eba2b574c1867b9d170507d1690aad97700fe4e7ef67f844312505. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:26:43Z), 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/CAZ700707339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40be7b40d5e2ea2de40f5b9a21e6331a5832b188a1fef713ae2e42fafb89d6de. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:32Z), 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/CACEB1706289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba8b54f5a3659e49bf878528094d3ef518326ce9b02aec7b3661a5f5ef5fb90. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CACEB1706292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b39a2c6e3070bacc659c80abf92d2988416d1c75f0bf108c1ff45c976db994. 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/CACEB1706293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f855b8087ef17d4c87848e3b3101d6e83adbcdb6f883f61ac7c60c86646fd8. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CACEB1706295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf527f7957f6dbab413678ef13ad16049920951f8d49793dbf18fbf38820c647. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CACEB1706305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74759d2f70cb67b05ef571a45a2c1461a8b8b8d9ce4def2e0b66f8f32b707bf. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:00:10Z), 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/CACEB1706309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6143ad9831a66b1a5d4e667ebe801a66ca1d011ab18f354c8a47e3e3d8f3facf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CACEB1710033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9e9fd7efdb898230a5afb85926fab11051849746797fcb9759f284f638ed8c. 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/CACEB1710034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd6eed95429909945d1b653067861969ef5117969cb3ac9c80e571ebf83c98. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CACEB1710035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b3d86e585fa8b7b3762f6895970691089e3743ebd6d208bb8745f5fd10554c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:57:09Z), 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/CACEB1702942.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4427abe86587a08d38f416ccb038ca0f0565fd67cab505248cbd22277ab0d782. 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/CACEB1709319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58585e099479a23567cfa5dc77b98947b24ecb2eafc68c93c8dbf1f2b310b1f5. 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/CACEB1709322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85304be6cf44afca28146eb1fb45d6a92a2296a87d2b6ef8bd3f57f6be9a53. 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/CAN0A1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c0565feffcf611d05f24ab8ff70345c7298bcbefa20a489e850ca3c8ad7d7. 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/CACEB1709326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8be7813f6c5a9612878f36ae06e96abe9fb7183d2702658723401b128b6f53. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CACEB1709329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde43693c4ad8c6fae63248e1b262ffce7d63d3448a3be9a36669038813a7bc06. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA86Y1249002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c443f2452efb15c4e292e70754d3fbc6d9366012e3855d72455ef1af62b98c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CA86Y1249014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c48eb0ec072e2340a426b9f90a3644fb97aa1434c4fafbcc0584ca5f6a3aa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CA86Y1249018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6828c45e6845c058fffbc7d9a822fdca47bf03099f4779c2c806cf4425824. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA86Y1249030.