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 0x5d54855ba250852a78b152cd78a68d33065c470f4d94c34193a8cbdc131336d5. 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/ee678383-8ddc-4996-ad89-712efad1c355.json and https://artists.proofprofile.net/proofs/artist/ee678383-8ddc-4996-ad89-712efad1c355.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 0xa640f762eb6026d37753f43b7f74ed1895e2a885dee7e7f624e66248ebe5471c. 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/QZHN41979363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5532f090aac5faa0e51fa584668b7a656b1eb60898378c487edbc153b6c0fc02. 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/QZHN41979365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3b3d8f19e145acdf4c8dbf6ae8abc8a325dec39e44b62835786f97afb9a266. 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/QZES61997040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a61ea277097f0bca2c09fa401327e25ed2df4357e4b1d0a60059c96277ee714. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UST8K1841017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ef094cafae6f3e57978bef114b18e76183c5c3499933ebb37dcfc8008865cb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UST8K1841018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bdc3794c0460e90d5f42d791b2dec7017c63929e01e6bb45c0e6154d506c1c2. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/UST8K1841019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaad817e5c5dfdb4f337e49fffa1a1115941900ccba51d80a6449a9113dc8111. 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/UST8K1841021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814d92d2a6c67bb468498aa7a3aad62364cd3b7b40787f9e19699b9bad61794e. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/UST8K1841022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d394e4624672171cd320972c1c99459df3ac94bb1c5d4daec0dbc5f6ba97d7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UST8K1841023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349225fcfc82ab129697881914127bb4ce30909c15d03e10bca5c377ca2e97e. 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/UST8K1841027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c37b89cbfcdf499f108ca3952edd5875fd5948c4ac580cd509ec55c21642678. 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/UST8K1841028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbc24b8b2ed94ca48b36dcfe9578bfb1aababaa893d0e808bcc3b195e300c3c. 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/QZK6G2022541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88393d33956aa9c983313a506215ab26b3eeb0119c06abc81a397367eefe7b35. 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/QZK6H2098150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b176d70e434c4d6830e541ebffb72c78acaeadb8333b6fa613a341d5a68b8bb. 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/QZNWX2043349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb263f4df47c064e6e1bee79e85b3543095bb4bab9685ff291697f4a8e869db16. 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/QZK6P1921747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a25a6b16c820531f88f9aa0e70e85a489486fea90da4e9b16e65e3c36fe852. 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/CA5KR2231827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541cb02b2fcab0bf00a9e430cd1d09589211daea7857aee239eaee93e8676558. 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/QZK6P2199249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124659a98233bdce61fba39b4bdc77a7a5d6a6147d9863ff2f7a7f5833357975. 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/CAHQJ1883732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b500cce3c97c440097c9bd6f13cdf3c1df18c39a21f8c6309eac00c49a0f08c. 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/CAHQJ1883712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a551cb7cc24be0fd5b05e5e44a0bbbad2c07b57bca96465873c6258dd86bac. 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/QZK6P1921749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c924ad4f763526f28606e90415107de3b6c83c254e3480efa28ee8a9217e165. 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/CAHQJ1883738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091a832f61cde6599d5370145da8e48e4b0b861fe13a07b14e1df63f4cd8017. 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/CAHQJ1883802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b6d05f03ee07ee6b378fc3d2bdc49e5a0a869b923fbecfa4e0832dd8e67adf. 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/QZK6P1921746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495cf44be0eb0bd71cf4522b1d565297e510161dc9dde235df2c8b7327618d88. 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/QZK6P2199240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d66c24d33e8768024a2176048d18740db5db03db36de6dc0b31eeb1b645af49. 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/QZNWX2043355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db3d2b706f1593c8f98755093fee386e6902d127d6ab37b295109fe54910e35. 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/QZK6P2199232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf001d890df29ccf69a8c432458a4487256334cdefa5de1114e2b27242215eb8c. 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/QZK6P2199234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77889ace448723f7a4ce93ed3383b4d5964178eabf7180ed498066df7d56fd34. 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/QZNWX2043361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c3e58555ff52546646e2b090395a7b6c8b4ef6fa7864c88eb9cef56e63f27. 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/QZK6P1921754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f9e4045d6155335ae51bd8e96b7136cd2e6e20767d8fdcfdd9e891715a00da. 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/QZK6P2199246.