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 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 0xe90aeba6b91fa639685715ed08d2f180ddd4a0e70a8872525aeaeadf3ad3ffe7. 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/58d41c79-e3ce-4306-95bf-324420eb78bd.json and https://artists.proofprofile.net/proofs/artist/58d41c79-e3ce-4306-95bf-324420eb78bd.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 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 0x130cf1f5259fffe94414bba7c330e96ef553a4237710d396609f2f191f320736. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEHT41101659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01901dd1836120fa25bb7cd06695fee8d19cae7f212ad965804172706d702788. 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/DEHT41101661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc76feaf4583e06cc2f62d3abf4cb228f670dca8f7634be4f8654d99d927e49. 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/DEHT41101663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9971db8c87e7671dc990372f82121c227e8440de1059fe8a8fb56f2cbd192ebd. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEHT41101668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df9654c3041eac7fcd024c63db21890ddd584e350eb2a5bdf32457397c5b95. 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/DELJ81748859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485efebbe8f70f503c69864b81a90687a78957aee4ed1208cb2378c1002e2780. 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/NL1AP1905244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a4d94da3d9e9b009705af2db17d1759482b08733b3f809ab4977a9e0a84b03. 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/DELJ81935294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd1c9a18713bdbd0bcfa8d84d4f6215b0820783cb0c3617e976f10cd1104650. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DELJ81935297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233165283490b485db22cb07fc9874926424171092e43e2035e18d2cf52d2c2b. 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/DELJ81935298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb971490dbb41c423b1d2711da752c9547a6afe7074a3ff56c6d01f408d8124. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELJ81935301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e784fc9f808ce8d31c68906bce904b64e4e01e81b36098808de2be563fca435. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEUM71906764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a9d811df9f4085efc952c8a805dc95ce48d1b1fb5bc4f81bbe420b6ed8eca4. 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/DEUM72002379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb46cb9a751fcc513ace4ea17645f828590416c3f7fafaae88f0cac014653778. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CH7812060322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2d953e81f9d2d6913973f7b8b592caa04b55706bfd8d2ad2150e7e9ce41f3c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/CH7812062844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88346a1690050a31dcad372250cef6af4424beeeff603dd6a497932ad9b301bd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEUM72117254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52168b680fd510a3353680ea4dc8d5889ca255d4b6adebc5f2e9607307384d4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM72119001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6085c968c2f5a9718b2ccd491517df8e782aefcf3c1efb327357cdbe79069. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/CH7812223629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313645ca37aaaa2c1d0446e7dbdbb5a61620029711130e052389b6bfa21391b. 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/CH7812227497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3809873a8cf1d4246bbb5ce583987480aa6468c7d8559f73ad7ee59dd98b78. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH7812228210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56202966947715b46f0cc61d6ca49b211d0d730cde7d1462c4754813a4a63166. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CH7812235451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863a93ec03d6fd0600f9f17a7e17c862bea394aed7e91bd5bdf1609b83f86ca8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CH7812346439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb43f4a5e5579d5bc3d8a5e5457dfb8f73be63820b9d2342ce0b9d6a2e88131. 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/DEWS52300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ba3d0e5c4feab5806aba9afcc8afe3f51ca90ba934675a76c868479c6ec451. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEXO22317014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9306ddf682547fe3395d081715e4bc3716e72ad6ba401e754305193ccf158a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEWS52300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877be1c6fd8f96ddf26b80520aa7e75aba70dbdbcdd5f282905faa2ecb6025ae. 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/DEWS52300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87e0b34f256a7be305243197b0cf366fa4b5a8c9337cf2f4fc84e530f266579. 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/CH7812404953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e2ba89464155abaed00efb3008dcfc58975eac02fabb45ee639972f5ca3a0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZC62410131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adcb3dbf601b74e7f63bb880541dc03e50a45b61a4ae5294f23fead9ac73f90. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/CH7812412679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2e2ba89464155abaed00efb3008dcfc58975eac02fabb45ee639972f5ca3a0. 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/DEZC62410131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440c3725035e0f01fe4424a0ff21d6ddb0aa2cc0af375ab90dde0ef107318242. 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/CH7812412680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896a442ebe98d1c67097dc8d2a61aef21d7ea1969e8605ce5366c044fcac2fd0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/CH7812412681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb34e62233aa2804767212a425755819cf3ce37b59742ed5c30f87161c1e2f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/CH7812412683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4900c3f22f66c8932a2ca7a8fcc76ae021671eeb2be4dc26068ba5e0794d0d4c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CH7812412685.