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 0xb4ddc6dacf15b692099666bc486724c96db5a31758009e36329b13f0a08684d6. 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/90c283b5-08b4-462f-bcda-dc370ebd9ab4.json and https://artists.proofprofile.net/proofs/artist/90c283b5-08b4-462f-bcda-dc370ebd9ab4.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 0xfd5334bb6c8962b0609b3dd6b254390ee40cb9163d073b6310ee34000283e702. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T12:59:47Z), 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/QZNWV2085772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295b5bff8b429e9487fff447884e54f56ea600d1ab91edc2c1a71ee12f2cabe2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:03:17Z), 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/QZK6Q2171782.
The Avatar's Love (From "Avatar: The Last Airbender")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d8c2a0592f22c21578391767fe3e6288d451230dc5025b15c87c82e5d41f46. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNWZ2172230.
Ashes on the Fire (From "Attack on Titan")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592861431dc56245be5ae2e4f66825a84c4b01e4ee6d6f1be55f198f4d85b071. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWX2286322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf67058ebe3d128a71d9f5ab693f1b4d43210d954c3b0e9939942b7c2c8978d0. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:39:22Z), 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/QZDA82372899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76a034daf03c0162770f6cc8423f3789094383031d3659097453b91b2a3568c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZPJ32260049.
Prelude (Final Fantasy Drum and Bass Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3ce2cf5fc2aec1bac5f14a385ef04fd96570869530317d4b4592e4bc86748d. 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/QZHN52463553.
Test Drive (How to Train Your Dragon Dubstep Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bc63eadd4d702581af19461d9f0f41e63bff082628f26c8134c5ff656273a8. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFH2439580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2111bd5a4526ae22ce51858207fa47b239647c67efe02f7e0340d39b92bb3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFS2499458.
The Songs of Yesterday (SVNCTUARY Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b0a00e8f699a6700a73832ac19476a9bf714df5ea2983d65295ea0688069d9. 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/QZZ7T2413458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93342e57790b317dd0be506ce13a5bd6d595475fc5c2cdfa2689fa8bfc0d119a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:39:56Z), 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/QT3EX2453583.
Sanctuary (Kingdom Hearts Dubstep Version)
Sanctuary - Kingdom Hearts Dubstep Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7fb37e2f095eab34a47b71c70dd8912718e8c3161cb33fd94b795ad8abefa4. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7R2515519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4255a6242a0b1f47d798f529fcc4b1015f03fad2e388c3ab44590be58b88259d. 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/QZFYZ2358479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c90ae722ecf6aa46eab4993ea070187263868afed4799a2a8399c3b1ae5f1ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZES62255192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3ce2cf5fc2aec1bac5f14a385ef04fd96570869530317d4b4592e4bc86748d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN52463553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6db09cc96d4bfd9c2c221049d17a254940c250936dcefd3c3e2a7cd6a6c863. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/USDM32357503.
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 0x115f4824430f71888b6d78438fd539257e23cde125d8304e1d9b2b196eb0d45a. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZES52500211.