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 0x534f07afb1496178173840cef00551e2172e5f0c555a3cb8bfb7d32c64a3f8b0. 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/68db9bdf-32e8-4760-aa26-7d5d3e4e7398.json and https://artists.proofprofile.net/proofs/artist/68db9bdf-32e8-4760-aa26-7d5d3e4e7398.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pick N Choose (Nikita, The Wicked Remix)
Pick N Choose - Nikita, The Wicked Remix
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 0x52f584da19150fe36b641100f607d50e2e9c8c17582605db3975445f13b7a5c6. 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/USUG12306339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e219454dc28241fbad99ea0222a686234cf114095256e70277048a614a0f76. 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/CA5KR2469773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb96286edfc6d34b39758e295ea7185469845007c86ea2b29beea7c5d5280d7. 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/QZTV32416641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d40bea7c9e16bf81c81465165b91de4b386537c819b2ba1b06d402973cbbe. 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/QZTV32416645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e253bae2ab570794aae1acfa6b8c204a8e8ce47b9af57f525a1d83ed60e9a. 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/QZTRX2451382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1e06adf32167ad4be37541b246fbf71eff0a61d7c2faf8550266166b9466a5. 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/QZTV32416689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceac5c1ee4736087c4cf4ff5c1d70951c125d412e30279107b8caf9d952059a. 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/QZTV32416690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e253bae2ab570794aae1acfa6b8c204a8e8ce47b9af57f525a1d83ed60e9a. 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/QZTRX2451382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd041cb06b23fe1ae066720c2a6dd2e7ddb89681cf3755dce6ffb7cae23594d. 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/CA5KR2429670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b1bd96864583eb27e0bcb781aaa63e6f9f17dacc54585ce9828ad7e935eaf5. 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/QZFZ62457563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fa541b5ba9610bad112b7461c64a968dcb8bf8ae14dfdc751f4fd3cb9af7c5. 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/NLRD52339936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb87dafe65e60fa54ec75bd025524eaf9cba8af801da139d918c5fb9dc6a0198. 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/NLRD52023173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3fb6bdc703de8b603c6dd2eacb3952cb11da8cc2ec3b1a966280d68421e37b. 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/NLRD52023172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa49fe70befdeb6c15fc6a4b242cb83df0f1a74b015012690a49a35693c7bf84. 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/QZTRX2395336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d6cad06e6497973760ce9e1175302bc9a8bfc88f619e8ff69061a608d14f0a. 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/NLRD52023105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98581634a47eeb68fe1d5a27737656ebefc4b48b62690ad81913371a260afd3f. 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/NLRD52023106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab45c8c25d35f2f3012e474333a0c709b6780db753436e22aba2ffd6e39f079. 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/TLREW2227877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b98c1f6c9c4d9df24ce3bca940225c0a736bf133ff1f89c6e69a8d9a8fa182. 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/QZNJX2266043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1d96212aa868e0f53444a05861cc3dc9c5513acba4e66ef2572c5ce8e2f581. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES72237186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d82460ebecf02bd90ab4caed800ab91a963cbb7b72c5f95a3213233d671f35d. 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/QZFZ22204052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db62f6b992bb378c14e4345b8360de071775085adf7254eaec8ffa70e59b227. 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/QZNWR2140391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47acc24687e1bdaed4a150b1a46d1c11bb11a39473eb72504edd6c0d5b804c9. 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/QZK6M2141721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90ed2466d6ee7eb312faeec8946b1b39a1374d58fe61bc9c897b3dda07179f0. 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/QZHN72119243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68fcc5dbfff2743ff6c6e35769619884829f69b73dae921a66c5125aad444f0. 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/QZFZ42185449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d59bb2e13f024cf1c933a3b1c68f52ae8ec5b6cb780595217fafa1ca7ffba1. 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/QZK6L2056652.