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 0x8c9fcc372c5c4a8159c56128dd623f02199566351d6a42123b110ba4828be7a0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4e026e6-4edd-4530-966f-913b94fb8e64.json and https://artists.proofprofile.net/proofs/artist/d4e026e6-4edd-4530-966f-913b94fb8e64.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 0x5867af9e0528357bacbe204e192aaa07fe8b61b6747edcb4bcb194991c6b6a9d. 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/QZFZ62410665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382d7e87db3f61efc05aeab9f66e99a240acf67ecce67ec93012453a212acb3f. 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/QZFZ62410666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931596c6242d21c823d6b463cf988a7d1e85dc0c65941b6a03716a665fb1ed1f. 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/QZFZ62410668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9e31ae3f9eb67d00441bda88c01be38349630b4a912088e70cdbb47d0f90b2. 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/QZFZ62410670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc150c56689e8c5e817fc662a64a2ee946bffb66c90f19389e1624bcfaeb32837. 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/QZFZ62410672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac23b5636282f196d6b3ea3b2714a6303927ef84a7d4cba3f5e59458ffbfb9. 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/QZFZ62410673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ee8d16204e1c06edc0dc0d0aa28df58856cdf7389887159a4ab7a2f4b152e. 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/QZFZ42489138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521189a2dedf74427ed0973e37989a3f5adc2c2374914649734d83299d0d2276. 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/QZNWS2442415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0ee32cf9c870af1419d19894511201cedeff6a2f4130d799a3d0fec8311697. 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/QZNWS2442417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a71413c0a55928397ed03a251a7a9e07905024f92f9c6cfeccc76a8e25c9099. 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/GBKQU2436837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd211b487564f1412b0621e47e3eb52f97c7a90abfa69f71fa95ab08f8b8329. 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/GBKQU2436838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db01f570a35ef49caf52452bfab4bfa374f320e4ea96b9e21f07f0fc175d4d1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFG2346298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad3f597353f81811c0c8ed0bd62e8ba41800288114ddb5eb5e1efe4a9db8383. 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/DGA0M2303642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae52e459de820772750cf19487255f1e5041d6e1dd731f833a9a818199d77fc0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZKDK2283707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e0271ef1f07e1f04cc621507c624cb72b37a6b24ddfcd5e507778aacd0e7aa. 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/GX3HH2181254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7a3da12c4ca67536768797dc313343ee31013b5fbfeaafc3b6026b6cb4b53. 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/GX3HH2181255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d352106a290af4c3a56fa67472c309e3b9fa34fa76757d7ff6d30c72eec42a. 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/GX3HH2181256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aab257cc7334ca7f94e2742a39f3bec8ba9860545d0ff1ecf7436bf411c6cf9. 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/GX3HH2181257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f3ca2014ed9d0e545e4b26ea67a083aadf6dc498d8461da7c332fbcfc6b07. 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/GBSMU9155213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8280616197d35cad6dfb23250930afb4c3e16fbfe34d7a889f3cf7e6c21359. 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/GBSMU9155214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb51f518a5d811e06dd55c15bcdda433114b87436e742c01a55f16976219425e. 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/GBSMU9155215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a7c93b80df99ddd96ee67a3bf563d0f9fcd50b9ce68abdbf7b719edceaafa1. 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/GBSMU9155216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34e134527a2ffa1e5fed2a52c98dcca016c5f367b053ea1e72c84ec27c5aca7. 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/GBSMU9155217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95184dd9f0c6d85e903960f95d19cbbf23fabed2cf16ff01abb5e78b22603d5e. 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/QZES52595588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14671ab89f61568fa01816d42a36b06a49fb2b69fed77048e1f99b4812309b5d. 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/QZES52595589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31f083e2af2a60ac9a4d00026acd9cafba96da2adb7d905e4d50a432285add6. 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/QZES52595590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ad056866eb2fce85be3aef63dc7ba4a0df59f96930d547a0f281d23d8c4f2. 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/QZES52595591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c42b26da6568933979abf8bc840568a8e0094ec61a22f15277fe1cf04ef2b. 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/QZES52595592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b66b3609fa28b1c09d119df36958dd75c783b46a5d57f987ccc75bad00a749. 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/QZTBB2439888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e56501edff718562dae66a24983fc2b0a2a5471b5061c5178a66b213fee471d. 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/QZHN72517939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3185e3a3e5e799bf9c8663ae7abd6a5ebecbb19c9b2f0a9c514eb910b401432. 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/QZTAX2364578.