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 0x8e43a18f7f4b3540fb6bffbae93729373e9ae5fe53467da1c7bcb62e47821f3a. 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/4adc958c-64a8-432e-8614-4ff511a5cd18.json and https://artists.proofprofile.net/proofs/artist/4adc958c-64a8-432e-8614-4ff511a5cd18.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 0xc84d1d8d609a50f97aa9639297dbd71c3a790d6022cbf91373d522531cab160d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US9FL2100048.
Outside The Lines (feat. Little Brother)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e08e86e0da4a1d938af17ee19c73b901d2b2526bc42709c11d5443905b8af. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US9FL2100051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138804c855521561f9e43c9019cc4239329896c5d7a75f5a68cc0914a9d54a4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:08:56Z), 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/US9FL2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad16b28b71253124ea5152c1c34693e607e3115325d4bdedca9e96839176f3. 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/US9FL2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1300419b124a45a2bae1fbab07e935405ebb8bb0de45f8279d716749fed684e3. 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/US9FL2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced5883345ee3da4406a500afa43321e48cbac8e4f07d3e08e3ee567ef50f8d1. 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/US9FL2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad9ab46a497f26c2ecc68c2f3f596cbaeba99133c4879e7fb45b37fe2c3808. 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/US9FL2400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39007c142b928ff28aa7b9711dea89fe2f13d07999bfe4fc05688b99e9da1c4c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US9FL2400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c49f25bc18a7bece1022b41d926a141fa8cc7168c9ec6a86e288352535e909. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US9FL2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c70d6eb521cee29b748df40c65dcbc1bd818bf0036934ca707cbed68a608ec0. 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/US9FL2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e846750128484efcda4abcaac1fdcec7cf3de1710ef1c9caeb849283bc6501. 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/US9FL2400096.
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 0x66d8c9c5760fc3f16a44ad2ecbd0e2d6c8edb210f1297e14f4931e3d8d9e5491. 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/US92U1906851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e04bc34c62f258ec486324eac57ce848bfe7a798cde58248e75ecbf9540395. 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/QZS7J2336713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01170255955a4fd7b4de134f640da379a2062387aa4bf8e78fcbde3ad8ff0782. 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/US9FL2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01170255955a4fd7b4de134f640da379a2062387aa4bf8e78fcbde3ad8ff0782. 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/US9FL2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497ea1eec1c9dca886131c63935015d2ca9a6b19fe023a3280c4127c80197fda. 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/US9FL2400077.
Choices (feat. Phonte, Bemyfiasco & Kay Young)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d9962d813085c8774daceb6fef9d80356e87e5b63fa567da04e294cfeca22b. 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/QMDA62298927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221e17ecb2afe58de322eb64e06d42f4b9d5f077bac9123fe9e278a93d842b71. 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/QM24S2303778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958801d1460c30e26045bbb05d708009a2e8b90a5a8b7319dc66bbf4f6f0c1d1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DGA062266349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40c84f5c3d81d9b86ada99a482c75e58be8f26a0ef35ce9a788e5c90301274. 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/US9FL2400076.