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 0xbae1c511e86e30af096e10403c7dd7c3c982efc8e0bc8fa31cc4c89d6a106361. 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/b78c832b-744b-431c-a1e3-819c5ba78e39.json and https://artists.proofprofile.net/proofs/artist/b78c832b-744b-431c-a1e3-819c5ba78e39.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 0xd208611e5d0566c33f3f920731a807f684772245ff38f1d42c66aee85ac4bcbe. 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/NL8RL2433810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c6f4dbbb6a0b38b2919037cf6bd6911b61c6753f8b41678703be280f710695. 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/DGA092401507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549151c076e5a4f44a951dc279d905b611f0912852fdb883cd28cddd52339585. 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/DGA092401508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd61ae4aa1dc3a5c06fdf707f620004a13263e4e5dee5c7069d3a794bf2215b. 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/DGA062420321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619d2a7531b7b7821a203b59f2ed48cdd1d5e408ed9ab1aa43b190c9c5fa129d. 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/DGA0R2331540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f55a61bca42789f3a9ddd97dc3e1ff521e7438a1382cd6edeb881edd572544. 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/DGA0R2331542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae3ea4e31056d494d4afb1b7db58e1e75761444421d8f0830ec318920448780. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DGA0R2331541.
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 0xf2fb0e7c6eb6e8bf864b6e633eb09e4fb7ca73f279efbcb7b42feb85100a26e1. 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/DGA0R2326707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dbe7642a568ad5b53690b0bbd8985a04404219dfc124126969a5388f6e1321. 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/DGA0R2326708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5919473f40c21243b018b99c31525efd95c83e96870c5c9d7f4101dbc0801b7a. 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/DGA0P2312153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0daa19de4ccb5eb5a00bc73301e31269234c0002ac0fedf32248445b4464d1. 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/HKG731678434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab3ab7126ca3e0071ff41b704c6c7f57a37e06ab64bce49a757a5af6d4d7c9. 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/HKD012268753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3397e1f78303ea45614fb2e8fcba131d39f057762381ef4a3846d5906915da. 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/DGA052317574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08defc92249f9b73efc083a016a257d96f3b94b058d51922bb89dab7243e6215. 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/FRX762333818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683b24a79bce2b1a2c2155dfbe61ca2046c6bbdbb31b9347de90a87fdcfe527a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKE022211565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f24dd1059bebfdc75c5bc305a961bdf758268e819e415da32053e04e13a4095. 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/QZNW72316984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382ac0d5967d6963e412ba4e7e59ea8c84629c3e2a7f510d582ddd14587d5e1b. 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/QZNW72316995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdea8bd791bcf61e75edfd20937e0890df8718f3802e3f9bb0e7701c60b0ff3. 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/QZNW72316996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb2376f311751b5dea86db669dbbc3230190062aab694e30d837d2d1f79520. 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/FR59R2313924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba54195d3e97fe75317e0ec408839898fcbed55949ed1af1720f625d6de908e. 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/HKG732291445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd25986433e5a63d604f4b4b1767a3d0edcfa3163747752050dcb7fff0247fd. 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/QZNW72316990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e8b842dd91e3968f54226020308356a2d5facdecb62f050e4762166ca9de50. 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/QZNW72316992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc689ccab19980df256789ae9fc2f91238ec0b89be0e529821a2e8ae48723f9a6. 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/HKG732253151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bd1571bee798d6d6eef27cdb0d7e1f7fac5ae554ce2d63362cbb709fb9b799. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732253152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986a2d4bccd6424d1c2f83288f39307805b6b1e365b275fb87e29e374a804032. 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/HKG732253153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7695c6241e91a124be5dd58692d67da44348cf26d24ceb66b12c054226c7d514. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/HKG732253154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80a0872d1182b8c4b443cbe95af0c84de3a1f358de221c6f1ff4bb7591d7247. 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/QZNW72317044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff967ae3a85a6575acd812eb0711b3de449080187b5b0498e6100820443979c. 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/QZNW72317066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7a2f3d57cf2fcb880e4a48f887fb9377a87e3efe4c7676134e1f8c15253785. 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/HKG732238127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b5b0c5b5363651bd069f1afc91104775195ca88773ed55f688e5935ebd1236. 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/HKG731617068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa604a8fbe72d7e38e4a4df1952eddf3e7a9dea32fc724f9e0366eea744fbde07. 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/HKG732229221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61463ca6c2ba76d3cf96cc6585d99d7f28979a6437f755713e90ea56c89f0d56. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNW72317068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8027ddd0cffed8fa929ccc9d2e0cb743c1b5f65ddfed75d8308845cd1c14b3. 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/HKG731617063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42348eab2475c4dce0ff13242acef4512c432b8db3c69e020a48c10b8c99234c. 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/DEHY12119863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa7d33a84066644930852f5ef895bd49eed7ebde6de6bba18142aed1e5833b0. 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/HKG731713314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df18dac5323bdc3bf32078a6f0c9a327a6eb42e9614e7cbd28c246d686b4d2. 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/HKG731617077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdda821cc872cfb498980c63a208c012602a5a242722c360876bd666f43bfe3a. 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/QZNW72317073.