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 0x054c97822ae2306d0f913fe231ad96ed12edb32b95bf644162ef15303d02b0e5. 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/c7c8c4a3-8ea4-4e6f-a1c6-fd737f41406f.json and https://artists.proofprofile.net/proofs/artist/c7c8c4a3-8ea4-4e6f-a1c6-fd737f41406f.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 0x03a92b77864373dd8215802b8570cadf62f2cf519d8d47b763b237294b80bdbe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM24S1907740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d1d4e8701645887d2e36758abea632647bdff309d25bc1cca5a20f7500c445. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM24S2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67713ce27cfe221ffd285af00ee70e8d8f91b67f5b3bcecaf70a9c6805a325. 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/QM24S2102699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5b35bd17cf738e1243cb026efc0f4a666ea99b34a88eb817a818f9565b3df8. 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/CAN112200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49a69b4bd4ac7fae2a262810eeff902a627a1743469991463bc9a4a984ce130. 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/CAN112200781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90d89a6507920e52a73be9d44bbc9657dd82be2d64bcd411c72c2b558b871ec. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CAN112201079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80009448dfd069274030f3128996dfcc147dd99eb99308421d871a8f8daa143. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAN112300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebb65b66409fad54b3b7b6f863c259a6438337dfa33c675a25b2dd757a491d6. 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/CAN112301937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9b0fb7cbfb07e3875b794676c862ec55a1efc86517a42591426ff5d2cef29. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:44Z), 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/CAN112301938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a2617dc20835480202881ec68ed71b376e0dd2ec9ff26194e302bdbffe459. 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/CAN112402288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49a69b4bd4ac7fae2a262810eeff902a627a1743469991463bc9a4a984ce130. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CAN112200781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a2617dc20835480202881ec68ed71b376e0dd2ec9ff26194e302bdbffe459. 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/CAN112402288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49a69b4bd4ac7fae2a262810eeff902a627a1743469991463bc9a4a984ce130. 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/CAN112200781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f981687e72121b3ddecc6a55783bec038ceffd27d0ef333039a27e3161c94fe. 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/CAN112200332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d20646e1ebea43ca34579c7a870c3604f1d1d49da1e103537c038ad9e2bb8c. 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/CAN112300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d20646e1ebea43ca34579c7a870c3604f1d1d49da1e103537c038ad9e2bb8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAN112300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d20646e1ebea43ca34579c7a870c3604f1d1d49da1e103537c038ad9e2bb8c. 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/CAN112300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fefdfcdd936e0d2a6334e972cce4e4aa8b0d99d8872589c734a0f2be75754a4. 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/CAN112301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65584b63332d76343a8b2d48fa41fe46f47096c4e614a4682cd11e7a573b487. 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/QM24S2303625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2875fafdeede90e9a6c7f2ba48719d9d31b2ef388439ee4ef690bac9c3f7654e. 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/US4HB2000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1465425ddc1521dc7eb7f1b351feb0a2fe4b2780c99e51dc31525c29f95854bd. 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/US4HB2000185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162668ef5f15ce6f886550bc6c466b3081152f1e1b39e1be821a226ef7ddd798. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CAN112400859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fefdfcdd936e0d2a6334e972cce4e4aa8b0d99d8872589c734a0f2be75754a4. 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/CAN112301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162668ef5f15ce6f886550bc6c466b3081152f1e1b39e1be821a226ef7ddd798. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAN112400859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23820d20b67b257865b0c4e035bf883ca0b27cbfee84cd8f88541bea149f23. 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/CAN112401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23820d20b67b257865b0c4e035bf883ca0b27cbfee84cd8f88541bea149f23. 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/CAN112401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23820d20b67b257865b0c4e035bf883ca0b27cbfee84cd8f88541bea149f23. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAN112401109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23820d20b67b257865b0c4e035bf883ca0b27cbfee84cd8f88541bea149f23. 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/CAN112401109.