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 0x25917e5b67d8f7bd7c83375567242b0951ea42391c41490039a7c37f7a305c6e. 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/275fb3bd-0ded-408c-9e9c-0c9e55d6d921.json and https://artists.proofprofile.net/proofs/artist/275fb3bd-0ded-408c-9e9c-0c9e55d6d921.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lullabies - Calm And Soft Music - Baby Sleep And Relax
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 0x8edd99160e08f6bf868fdc7e90f5f7173a00fa117af725f05c5963f927093f90. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DKUM72000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483c85e49463702eefebb994b89b055a19d55249d56150e2162eb8cea70cd58f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DKUM72000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2719fde6fee8a869993092c97bbeca54ff7558709c3e757b6f350ccf2c0fefa8. 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/DKUM72000057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb706da06629cf921390607c6841413d3f5471a9d1e5516abfa714653462226b3. 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/DKUM72000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b01805486e556236ea4da67068f1b95059d71e6902d79ea332aff67220b76c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DKUM72000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06499795aab616c97e56e1674a308e0b0416345db0e8257c879632c8f887e242. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DKUM72000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cb88d0282a4fb77f51c5e8e184fea1cb4c6254b530a2a50eba3c2d614820e2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DKUM72000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922f5a5f76a5f3790f6091b74ac22bb43c1668683fa82827851265b6f719e027. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DKUM72000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad060cecd54cbb9aed12609222d4ff9b6f679ffc81cb954fce4e22f4f8ec760. 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/DKUM72000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49636e12126f99eead2e892bef050b345d35c060a91d1d0fce99abeb2e107a19. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DKUM72000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2accba0865a031b7375959a10e293bea371491f534fd2113f8824780fb2ce9a1. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DKUM72000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74aa72540fadb575399d94b843ede19f8bfea9ec83c5061b1a6589eaf991fe. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKUM72000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d54328d8beb04495c4590bb4c45c424f0e1382a2691e6507dcc87a8fa6e2ec4. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DKUM72000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e8b2c3fd085dd64b440097ce5bed4a570626456d02cb710550fb07c20bdb3d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DKUM72000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b6024bdd845c26b30961d7ea3e3db256e74a8f9975ce9fcffcf15766633f4d. 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/DKUM72000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0778ecec3f57a9ce37b6c7b08499ce2055655f59a4dbd0b5656df68631a90e0d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKUM72000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69590b6cce3d7034c728acdd6d261a90a76b9d8858a3965a5189286f2871dc9b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DKUM72000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b7a5125a55473aa92d81856336c814c461a2bc2a0157c4dbb4f6a0664a35ce. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DKUM72000072.