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 0x0f81e856325bfc564ed9a73b5f05dbd3750c67439203e4aff78ebf6f04f4b31a. 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/5c5272ac-3fec-463f-aeff-5a73cbfd3a4f.json and https://artists.proofprofile.net/proofs/artist/5c5272ac-3fec-463f-aeff-5a73cbfd3a4f.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 0x0d93295203a57186ede656d0d14a294e6e2d1f3f265b402d2cda37e3f913cb3b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZDA61860278.
The Boy in the Pitch Black Room (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2345bbae20e98607a2b86764d6bfc0c2c722602078f43103e43f677c49808c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNA2104981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bf169ef3e9d549e1aa68ed60be53950c0052a2a0f82625f526b0fe352b6922. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZES92374966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb373106b82f19a789bf7435f30ae7d540ec9823d3d22a784cc4858f71de4d4c0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNWV2350885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10492d24d83101c8c7725fcd80ddc2687345cbfbbc0696cce7b396d6506e6af3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB32313448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04d8fd51aeb8b059535c662e89bc372d680899219940607d3671b18712cdee0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6M2339880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bf169ef3e9d549e1aa68ed60be53950c0052a2a0f82625f526b0fe352b6922. 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/QZES92374966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73029c0b7a42f53ab3592e652e42a01bbea1d749391c43bec711ff8e06820d63. 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/QZDA72415380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc9ba76c4b75c84d509338803cc87b8554f38ffe93b52308c939764d7d181d. 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/QZDA72415381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb71fca84cc9bb3d7159faf46fe7d7ee4b3730970c64d8288e43669bc98807d9. 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/QZDA72415382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631db1a5dd850e7692bf81dad3708557fc423003b5c10e9ad28d51d6e7245a0. 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/QZDA72415383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ced1d88bdf50a8b4f195e76f6c0e29698f44c087a67c7766fbeb4de106af1ad. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZDA72415384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff34012a659d95b7a04fcb9dbc20983c326af603981192b518b96f06b6e157. 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/QZDA72415385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1635876089b02ebbf97cdde189612ab42398a648e4bdd26e7d96ad51eb27ab61. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEM2430829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ee16c11158954121f68029e6ae05e54a3d0e5762e80117dc69eda8e66d6d42. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZMEM2430831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fc6970a2676a95b3d9755cc6e03495d102a8ac13f57b48ee6f55dcd8d76816. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZMEM2430834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e370354f72530d6a0f75e7c0dfb98bba3f97742be08a862d7788414b1f101d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMEM2430836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5695810d55b89d291c28204290e0aecdf1021c6eecedbd4c742b7663997b5e27. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA62217144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb82816caf6b119683436cca776406bec99c8e731948b6b916a4ae92dbb1bdc2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZNWR2596325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eb4bc48d3832bef1bf372ddee5de0a1cf9ab1c851658559bf8b068c55b3d20. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNWR2596326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c1bac8b66fa1698047c13e926da87c7fd95d7780369b9939bdf5f03d6b0835. 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/QZTAX2411790.