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 0x1b0cda221215b6b86ad82bf1ca4216e5bfe0f7e23b0b477b057511f357d809e4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81b6d9a0-cf1b-4e81-bdad-77c5bd09df13.json and https://artists.proofprofile.net/proofs/artist/81b6d9a0-cf1b-4e81-bdad-77c5bd09df13.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 0x96b89baf8dff03839c5ae7d811538bce091d247abdc27cb619f3a902aed6dc24. 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/US29V1031601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee083cea47a4b7539be1a628f253e5ef590e6def4c7d78393e9b40e8779988ec. 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/US29V0529401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d0baa234b458ff1fbd901f27fe5ddfe42d8a9f3b0524a74043c1646467f4a. 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/US29V0529402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ef1eb5f3a68a62191a25d4467c3db191485c0ef6bb4fa0b18252ad6a0ecb75. 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/US29V0529403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389787cfb28e0c41a1e53ddf943a58a2c5d6049e635f8cc735a28111a55f5581. 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/US29V0529404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a2f5d407c5d7276108d3f89736541e3d07e3447636e6668b07c5bebbd450b6. 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/US29V0529405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ec20ccbe286702dfce6851024d2772699e0b83055ddf6cb6048f2071b2c273. 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/US29V0529406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9091eb0451d70f2f06b594e4fc3d635dd1ff4323d0dc7b927233d9d93367842b. 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/US29V0529407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09417d48529b131db9057fadf2a05917c202458ccfc866155c97a9c3abe89e44. 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/US29V0529408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4caa8b88aada08de2cbd2363e04418780d52fadad274450b12a2341dabc9631. 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/US29V0529409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c33ebacf33aee980d8f14dce9aa6a59f079fc7f26662a47aa8e036e3588abdd. 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/US29V0529410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7544fc92ff830dd644fd725228e7fa4bab90c30db42830a546e9e190fc6f15. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/US29V0530210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee083cea47a4b7539be1a628f253e5ef590e6def4c7d78393e9b40e8779988ec. 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/US29V0529401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98da0dbd55b017b9a11e6053ba860c4034284ded8316fa505bd4f0b8af5fd10d. 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/US29V0428208.
Hemp! A Reggae Tribute to The Beatles, Vol. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430191727848dbe18feb18d06489f659db6197a97e4bb8e037c95f2bc84f98a2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AR1K21300026.
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 0xe664ad843230202087eb4f5d42e317bf9633d7a1dc6f44cb69e1f455e02065d2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US29V0930802.
Midnight Landing - from Midnight Landing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13716c9ecdb88ac5cacabafdebb5790d792868cb62530b9a6f1215ad7693d4e4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US29V0428206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ed51e6c4bf579480e5c1b74325e593958c80f66d062a4cb170a106b4caf97e. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US29V0427001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b4d0f213ffa4fdbc3b4a6b42709a035629cc01000685097bff9badfec55451. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/US29V0930803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb4cc0dd6b40f1ceff754b9ca7b1571eb836ba8359e34635c9a03f7393b7733. 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/US29V0530201.