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 0x02716641f489b260d7ed1114f43e64b5507b14a89470c853413c596ff0c94889. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54b6e213-80e6-4a6b-a9a0-f2a230254f64.json and https://artists.proofprofile.net/proofs/artist/54b6e213-80e6-4a6b-a9a0-f2a230254f64.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 0x8162add0980a6ae7150cc55663aff47b02c5acf7ab6b8cddfc95fa4550565b75. 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/QZWDE2328594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ea207a605fd1d89e6b57ee9ee068d40063f2cce710ca70b493bdbd9a99db0f. 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/QZWDE2328604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fe78b627d036c9f96f90ec466c26cd9c4642185e9feea94782768935a9db72. 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/QZWDE2328605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee108be159676b112e25be4780bbab0abbf39a65f675a0ec3ded271c62b0fd34. 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/QZWDE2328608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492f87e7da00a41ca5e4212376e0652ea712d5a1ed6225be6c964085f0336887. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZWDE2328598.
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 0x9714012f4b7abedf06ddb6fafbd2fafdc56e5d9e0e9c7e45f4f855d2f731b0b7. 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/QZHZ42240474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea9ab4b8a8759167b4f5f7efa6d3603d2654c6593dc006db54748ee6b7d3741. 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/QZHZ42240475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a208c245fcf7c8efccd4b122bb110741bca1bbbbc0baf7752cf4a0e42f9b35. 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/QZHZ42240476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a994453b4404bd4912852732d7e1ec6294f387e5424cd3e62e2fd24a7fe1ef. 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/QZHZ42240477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941f6ad76723fd16d82a055ae707a075fbd28f4e856b0afbf10a37737019783f. 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/QZHZ42240479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3248c3e198719a8c8452775092b7c78f604acead920c8ec21cefee1b0b222f6d. 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/QZHZ42240480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b31ea8a9d3cee5cd819a03a67ab7181636157d552ef5973b6121061e18c3326. 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/QZHZ42240481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1853bc6fd692cc945820e0dbdc667f6ece53c9790937fb1afd498b729b1be47a. 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/QZHZ42240482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe786741e2b1279daeaa4467a1bf8f3413f05e5d23ac601fba572ec5892f7d440. 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/QZHZ42240483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f08a7689db85a4af8f4d45763fee080d6f7c8130e6d79e4952daa21bafe6f0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZHZ42240484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28996b43093ea6413941bf9328a2f9ba85331a8bc181fb8a9dba67bc1b4a87a6. 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/QZHZ42240485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22830a186177288322b22e8d9caec99603ef7150d5349dfab8d47858a306ca. 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/QZHZ42240486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6a4c5e4d3449400e080d97e531903ee9834a0dadf623b3da519febfa40007. 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/QZHZ42240487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab2a1937ed0bf387cd525145e85515660b477223feafb277679d9a5e95ea93. 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/QZHZ42240489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baa11a5ef46a972adea1c1e536f0ba1b93b95cf4423d51cea2d66f9db9b70ba. 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/QZHZ42240490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1342f7855d00b47c7a4ccb63055f0e9091101f3798f42a2d71d5e73eccc0cf8e. 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/QZHZ42240491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0e38d8f464005a5a90a8709e3093ca87ce87fdfdcdedbe3fd509fe80b1a506. 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/QZHZ42240492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb08eb9931405687f1d8eb3b21e32f9a6d3c65d0233af2a04b02b169f3d4ef. 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/QZNJV2207270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0fccce9cec42af4c33c37884c9cebe70203981248ed0ace3b54f9a2ba00e69. 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/QZNJV2207272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6eadf23c38ee840364d3ffdea20554495a702890f539f4b3c8d66d1f3d99f4. 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/QZNJV2207279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba54da8fb5766c68463110b19230a983fe5d9341f609f8a6e315b1dbe122b2c. 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/QZNJV2207281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f588d6af1e8a5e978268a00b85cf2404bf4ec2306c7919109567eb3ff2efeb. 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/QZNJV2207284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc600fe8570d0e212f628f4d88df40c4844e81b6ea06af51ce8835d37b0de56. 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/QZNJV2207273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9a7f5db4698a7da293a979dbe5a907c1e50ef1f84c5efc7db49409b0ad545c. 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/QZNJV2207275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c9cbcf657ead29155a950d208340f4c0b1251afa8b10b54fe39dd33c07c083. 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/QZNJV2207277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424e1dcda8ed641d6ebb77e81f155f5066796f058e5dabdf9ae0a4717006a4a. 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/QZNJV2207283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab9e73a1f5137d551bb17a22436f1e574908bddd570585d894eb9fb4dbbb8ad. 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/BXIV82466315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc325b3214c08a61384a3ac48500623bdd8f57310dbec4800e723e55a4729d627. 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/BXIV82421847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56751958a42b4991ce0f5255b8c6d9c271af3832b1f1b612c8a547975eb3ae6. 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/BXIV82487788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d92cb61ed90746c299ab9aec46602e6610f24a65bde4a30e9c4b9c074c4af4. 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/BXIV82481884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eebcd4df4baa82a14f33c808be8911743d3b49f97cccfed76a00db3ca75da19. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXIV82493020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603818449452a7264662bd8fbede3a0e99bd99da8b6cefbfa93d0da67dd6acc9. 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/QZTVM2477209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee91eb359f9d1d26d0f0fe718095584f938823f760694c43d55a3709be9f74a. 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/BKP742500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc1d296275e67d9988d8d6cccff58ba97fb50cd48fab9c076be2284f72ad2f3. 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/BKP742500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931d4e113383aa1c9c28c3518d105780dff6db05351a69de269465571dc6db92. 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/BKP742500005.