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 0xffa70cb2c21724cbc8f9da7cb5292021eca63a75ba1e0f41cd91ec9073e39bc7. 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/8dc8bdc3-4731-42b5-906c-d36f2469dc9d.json and https://artists.proofprofile.net/proofs/artist/8dc8bdc3-4731-42b5-906c-d36f2469dc9d.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 0x5d6d9b25fd173259f056025de9165bc6f21bb9056a2f0f787051131ff727a15a. 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/USEP42044001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2976e4d06445b72384448b5a117b8e2452334780323e918d3e9a12d4a99def00. 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/USEP42044002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fae8c89bb7ae99887374acc5e1b4327029abb42ae2ee3d56a3b34c4f78e794. 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/USEP42044003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c4b00146092bd767174b24b3fdf7c85aebeac810117d7541a901b165ddc794. 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/USEP42044004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63448e0db6c958146717290389876aa94461b8cb6d3435c6ca2f6d7712c05b9. 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/USEP42044005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a150c173f50cf236d6098f8dd8446065460068d1ea4f79e4007f5e065c7c69e. 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/USEP42044006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4806c2c3385b49a837bb02cd9fa9687d8e0edd8ab231bb2c3b3ad3fbdfea2e. 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/USEP42044007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726373d9206a486f298bf11fd119af15ed5c841fa34efa57d9d4c6b079e1e3b1. 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/USEP42044008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd405d74e46954a966988117c50c3fd65d74e68997d3642e0137c436d5a59741. 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/USEP42044009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb337d7ce4d80d83eb25693dac87859a83d94fbb6f61a521a5c525c3ef594793e. 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/USEP42044010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec340e96ed76a033c3abb3162f60277c4e5754c3c432f8dcf05e3f0f379af5d9. 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/USEP42044011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b40290c526e91407cd5411b7203805ee43c53ebac76232a10e601c40f6aa3. 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/USEP42044012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cc78e2b52bff618c2699d45fe16daca53b9aa48f6f630b493ffadf3fa5ad17. 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/USEP42044013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6705b365bcb0c901ac0da649f867ecdf4e0f6b47866f1fbe52a617cadc8d73. 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/USEP42044014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946d922f739996e166b83290b2dc2c8ff063363698f96b241c69267fed2a37a. 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/USEP42044015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f8f029b771dd5d671a54ee150d93cb96b5dd66262cbeeb6efdb919fa6e1e30. 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/USEP42044016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e20129adb83c9529ad289c76a809b3ea5be4e1b0e641228cc538360f412c585. 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/USSTT2300105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27ac7eaa15f33f93a71943a40f582ffa0c369521bd94ebbeb3005baaf943df5. 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/USSTT2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac5a4da08f33404978eb0c4cf2cf6490f37eca98a77a8b16b456427320eea5e. 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/USSTT2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c4e04bd69b11485366a7dd79f8335b3a0108e3667b80258f6529520577eb54. 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/GBCEJ1900253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303a67784fe26997b46d9cf894e885ab882532a12654ac82b2a45047d8b2df08. 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/USKO11400543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5286376b14d9b7f17d3c2b892d275fc67e7fc0380a105af6a9e76870650d61. 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/USKO11400544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a8f90962848dbbbb1a6c88859733b4ee2448afcbe8c4737d1a6026373243fb. 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/USKO11400549.
This Life Is Old, New, Borrowed and Blue
I Am Shark: Confessions Under Water, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1753d3a4378d7028fbc01714f12609c7900d2a016061119abb40c64a31a0859. 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/USHM81444398.