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 0x11aa211e9b3cd43a80382cd2589f14cf91a1a7f05a8de59cbd24fb71330f063c. 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/595ae288-4763-4b38-9ca6-a057c20ff996.json and https://artists.proofprofile.net/proofs/artist/595ae288-4763-4b38-9ca6-a057c20ff996.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 0x17766d09ad6d2ad5d8f45f5a7e0a3b5bd55a7fdfe04bde72531e23a425a1da2b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZHN52334396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc2351d579c71c10f06a76619b407ad0f1464397b1ee82add95dac0ae0902d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTAZ2373291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf443b4828e6f3ea19fa75fd4e70b058f7717655b533dd0079f19dd26b5de1aa7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HUA612400504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98212938ba7f7fe1a2afcbb95f7079ee138548283cfa438b99d73b1061354b0b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/HUA612501362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df47bb6b06e0fa85b12001d7a38757fa906812be18fc4d2dc2b1cfa7693eaa3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/HUA612502251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d66fa1e50b9ecae6531cb3b02b5ae2ae7eda3622d9abcc964b3bdec06480222. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/HUA612504122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25e5ce34739033e0ed906164b448b2804eb2f2dde287a45019fe032d7f915b. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUA612504384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26851cb50605e653f43e586029105de09e85c707857e5b347500e0079dcc8f8a. 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/HUMAG2400307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f23a6c4244a1bdfea23648a4e0486cf33514e70015411620740854e018e73d. 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/HUMAG2400308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde428fafba306f54dc6eb5945fcdbe98cb76239cb43563040cb44d2839abbc. 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/HUA612303799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bc31f29ca4f17bb86d22a3bca420fd29a852eb06094a6d8cf1181600ed766b. 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/QZHNB2377671.
CSAP (feat. P.Y.F.U., nameatmark & WimmR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451339665438420ad072b71ad6057be099ffd4344dfebf3ae4815ab2fee1802a. 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/HUMAG2400169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba2ca4b6cabf82241ec240d4b13d9ad7b3ed0642d60ade056671493fc39cb96. 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/HUA612400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2225681331ded48a02af1809b62733a2e1a737caf104de6c831a52a4988b2. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HUA612404291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a68fc596d8f825f1b689a2cccd6b9a4108e5d0a920afb4bace5c16e1da8e73. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HUA612404418.