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 0xd1d052ce394ae9862faaf769d6a303a8b0205a66765fa1babae9eda4049d7882. 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/c208cc30-ad01-43d4-a9dd-19e4536c04d5.json and https://artists.proofprofile.net/proofs/artist/c208cc30-ad01-43d4-a9dd-19e4536c04d5.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 0x8433477fe46bddfa7d8574a78996a810dbd776fdcb92b40e5afb9e0d2f47a457. 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/QZZ662351414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a8df96cc60953e16c014f2f17ff20160868984b0295cf0f50e27b5410e9f49. 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/QZZ662348961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c5dd22084d55cb17c801aa30b376d5644aba7520db15c672f3c0ab1b184e11. 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/INK602310323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851c3b52c6cee228869b955fbcd99cfcb51b64b35d1d9713878e784a7d49214a. 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/INK602309835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9530ed160cb6a390a2d545840180cca345f25b33ba001bddc591142f05012f. 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/INK602309732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e6f5c97f89686b0a35137ea93c150d2f4e8c2343cea6c0bb44b570a6fba372. 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/INK602309664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10571912e6645aa4760907b5760179f853caac603f826cbc9d6e2a73c194d4fc. 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/INK602309482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127ffc7c988f6a0ff78fafe23484a6c700bd720d7f6be9151c8adbd1e80b57a. 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/INK602309485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f6d827a1460db9d469e0de278699d565bab90e4e2c0a5d6a0be38f92887ad3. 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/INK602309488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0411eea3686729ab42661c642254de4d411ae83e39e1f515f0826892f0ab4826. 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/INK602309388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13139e1fe8c06ba7d76e88bb93e2445178597cf4a1ed73f475f5e5890292019. 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/INK602309342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418104277d43df58668bfffaccc7074fbc03fa79b6b76143960045892e05ff63. 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/INK602309234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccd1930bbef546aa877710bb7898d362e3f2c4e69f499bd975a8540a97eb538. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/INK602308889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5042b31307796b56bb913c7c6e756f7daeff0bf231d3a4e790cff6a903e3d48. 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/INK602308812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511914b2145a82910a56b7294495033ec3e4667efdbcb98df28b0aea67562edd. 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/INK602308811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45afb119ab9ea5582d332e4ed865aef1b8c61455be5910f80c3eafd7283c61db. 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/INK602308810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83ebc01657707583ced505ddf1762ede17bf9cdeb357c72cc418aa08195bf7d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/INK602308814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24adee3432c114fc60b17b101e82938dca71e52b888063f6a409f0f0447c27d5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/INK602308261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec511285c115a0c97ea4e422e291066a4942327a6e7296037c877290e9507d4c. 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/INK602308263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0d26e4ee492241991db7427155c9f3b3f7f83ce9cf25a7ceaad73d8f95a442. 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/INK602308054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7230277b5f0afabd7484ee0b573813e5c28896d3acc174da22adff1ef88c2850. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/INK602308039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f7e9888a3be2eb2e1075c8717505fad7c6aeb61f494bbdd00eefb9af844930. 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/INK602308055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aecaa8b4a080b278ae33fdeece42e07e9f996ffacabbe7afbab7411c04317d0. 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/INK602307732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1614dd96a0300ff69505b4935bc45f709a6e03ead71a404f73378f79f8ef9b2c. 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/INK602307720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048e1b373b1369181d76a8ffcda2cd10f7e3e2c3bb1e776aa2c934b7be6b5a7a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/INK602307728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e72871bdad6121c930e3394e8894c9a7015fee3d9cba203d1636691ba9c787. 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/INK602307722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adb1489d2cf629541af2d2f1c70bcef71a3848ad3a1a6ce4f3f26166c7ff2d9. 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/INK602307708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3994e02b1046eeee877496324aca2c6a8a739fa2e3e5db733b2f8193f4b45666. 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/INSI32300523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3943a136b21cc78a4dd989db7ba95c2dc364f83260deab88260a41ad81ec6b17. 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/INK602306875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82abe8f0c008bec725e58e35d3b44ca7936e6f91807a3cabc973983aaee4c292. 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/INK602306826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346ef90c10e82c60502bff6b40717e21ac95501ed872ea7d63387620c5cd250c. 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/INK602306799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2f07820e0bc9eccacbb4e8fef2e0d04b45d4a089935973adb4e4e6ea635844. 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/INK602306801.