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 0x343ef9f21111996f034dfe46e0fe6b1b17a7b738e5b582bdbe2cae3c5996c1b2. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d94e0e88-f0e8-49c3-b6d1-a195ee074ed3.json and https://artists.proofprofile.net/proofs/artist/d94e0e88-f0e8-49c3-b6d1-a195ee074ed3.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 0x4eb973da6ef078938f953bdf11d523e5a4bf59b99f2ed5c668cfffcdfebea072. 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/ITYKP2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1bfc97a9646b71bdd11d1f701cd57660d3764e5bf061cb30bb094fafdefac. 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/ITYKP2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd3699534d8005f4c14b9ba863bf4ba868c524b51a79d3feb88a77080625fa3. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ITYKP2200009.
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 0x147f1c781c01577087c715c8db9a39af61cf18f5beba3ac4c79163ff5f56b80e. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ITYKP2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ccbdcdc5e351830ac8d36ec8caafc5e3e6ae8b5cb4937cd452091bde0bd87. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ITYKP2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5322a9e83650dfc88a7948ea5e9878fed563a03113849faeef3fc2a010931c80. 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/QZDA72435098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806f0021e63a86eef688de6e817781ec4276e4bf054c31464a84adf13efe8a7b. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZDA72435100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcf51d54fd6d8644236287c674d22b9ff5bdb4d36b942614fcd7fbedf0a6fa0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZDA72435099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa42b8a2387508885faa1e689fcd93ac8806365f7816e9afd75ec70fdb3d204. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZDA72435101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3f8a8d303fa58e22b9910358b97698808df18255a1eb0c73f7234523ce1654. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZDA72435102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd171007a5631742cc8c3907d0b252514eb74d7a1a1a5faa0b69f9172b933ba1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6Q2445160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec457de861f14541f8e0f7c4081e8ba9d037f481bcff17132c5f054993faa34. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZES92518542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8845d2499fbf579c89c1eafa561130eab1ae690ac6545d25f7986d6c226d9c. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZPLR2547876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f10ee8373132c9d92e78e0c5189a67398bf143f66876a93cfa4d20f4aee4d. 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/QZPLR2547877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87e2e81a9a107ed346225271f74314f5e1a9b9bce736826bf92e96051842457. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLR2547879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417005f8ba5159da0ab587bb59c951a36a67f4d672ad49984bc736baa6505c7d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLR2547880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ec8b861c4b7eca0d507517e218d03923c727cfb668a0ffac03c3d6ca79d0a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:53Z), 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/QZPLR2547882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a725b7ac31424ca934e57511696c381ed0c1faa494deb11e0eecbea93163fe. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZPLR2547885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b49e49cdea1e9ce9d7a0647cee885e774206e95e508d4b5b02a049cdcfd13e. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPLR2547886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2693f520f5a412ecec197007b55efa25eeba0d336c9eb15361fba3504d7d92. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:49Z), 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/QZPLR2547887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7f23d90d51035c1a64752782e95d525f11a1d9bb29c1a27c63051c61e4b79. 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/CH6542253029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4929be669fedb5e8d8159fff3fb476bb7d361419e47d1cc63e7874b7620e0434. 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/QZK6H2393563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fb982beee35e77a2a0fbb70e62fa29ea5946e756e4ff8eb8ac1fe3d935a820. 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/QM4TX2260968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678f7c2bc725a458b1371c4ea967c395c8d75010ebb0a85fadc7616796d2565f. 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/QZHN32394100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe981b513f2e238473dbebc488e1788c75ef82b7b5b011f454b9ff584013342d2. 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/FRX762175936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfffad9cb668a046ebd64900f6686ac3a0471bb472b0e4a8d09cd036e7aab15. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES82270885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c450eaf7ea98c3fde64431680c283dc1fb01fb043f988d51c0a592a8caed620. 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/QZHN92211334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f3e2de085aef453ef193de8c4b6a1f1a0ded211ef21c924039b401fd8c465f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZES82270883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e59d5382954057f2843bf7d4374863011d43cf47b091efd14275e8c35d6d473. 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/QZES82270881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d3566b95b5baa8f8310412a4a52f42ea26127ba84741c948b5dc550239cf90. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZES82270884.