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 0x24b733ab9c5a504500e5b60388ff8918794f6ab55f348f1ad0abffa750426f63. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba90240f-377c-46a3-90a9-e9296a86cf84.json and https://artists.proofprofile.net/proofs/artist/ba90240f-377c-46a3-90a9-e9296a86cf84.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 0xbfd33084716df7d597859c6368a848b3d35c914999d9b90cb7c53c90e5cf26f8. 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/QZEKE1918417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d5c1b217e11bd82e10ceea8328c0a903d6b472baf78c20a44c51948ebc7722. 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/QZMHN2298788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1add2ac4e04eac1329c746633352a41e4255d2d7f113ef9323caa26c7001073. 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/QZMHL2074783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf85df4102dc2522da32bee8242464688ce50a4e1fbe5cafb056b49d6c797f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZMHM2032090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b92842bf0d55e6a077381ea46969f0e1f50ce628daa9ee709fbcde33cfc556. 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/QZMHN2017982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b9e6c8aca5383579945f86b1ff036d89993e189d23dd0a53cfc8a2d3e6748. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZMHK2006040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc14a42586c8eebbed8bec9b6280dee2bdb19cc795d99f5e1adad675b9c5af7. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZMHN2065030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0222a7238d16a83e83efd9e68a086c55f81288933e98baedf0fd7509130fc2a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCAFC2071567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ad95a06a04b31e7eb5a48551ae6af6ea7c4751e68737f6c5dd49063b79107. 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/QM42K1928913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184f5b6199180a7c9d6ecc2649447363bab53b2ce9888fbc9d97cb88623132b0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCAEX2069227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc6d4319aaaeaee16c65148a44df139ee0ea18dd2582ef5e2e001ceab5b301e. 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/QM42K2048873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10b8083158fe62fcd5a0260b62c72e95f8803744609b5fef7a2385df88a2b9a. 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/QM42K2002506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20cbbdd3f3b919f126d2021843275d2fcd85bde551055f1b38e689c863edc2. 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/GBSMU8129791.
Here Without You (slowed + reverb) [feat. Alban Chela]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67a2d00fcecb352021b87841b3f2cf5a599629ed8490656951d9b018087359. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS632209121.
We Don't Talk Anymore (slowed + reverb) [BOXINBOX & Lionsize]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307f97b09d88104fe4661232de927e67ba8103500e2927352079f4a195fe48c0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZS662231213.
Blinding Lights (slowed + reverb) [feat. Coopex, EBEN & Tim Moyo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03fea529073d35866200490048a3bc69958cd8b03979eb4f5072d4882c9ca1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZMHN2283153.
Levels (slowed + reverb) [feat. Marin Hoxha & Mike Watson]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77309f0681e3a1c03ab6ff7db7e5c34ffd227b3ecb6fc820df14dc589d93be45. 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/QZMHL2220001.
Let Me Down Slowly (slowed + reverb) [feat. SubSpace & Satyen]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45119826b59aa1c8981b361deb18bea529a7c24ca5dfcd1f6eedd7734aba2266. 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/QZMHM2259937.
Perfect (slowed + reverb) [feat. SubSpace, J Trix & Satyen]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1a80b687b8a19524d2cdefd647b12378a61f17d3100d0c2275c8b17445df2. 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/QZMHM2276532.
The Box (slowed + reverb) [feat. The FifthGuys, Tommy Rage & Trias]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b7e8e1fa51af24fc6733deaa1227168d844f6fa099163b8efc1955142ca456. 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/QZS642231090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff5ea12a6aaeafc9ef5342db70567adc72d8d2b12d2a236af5d20d3ad3bb49. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZMHM2594580.