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 0x916fac20e6a19cfe25682782d0833c83d35fe4968f4e50c61ef6f7a117f9ee3f. 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/3c386dd5-bcca-4816-a33e-043ebb2fd44b.json and https://artists.proofprofile.net/proofs/artist/3c386dd5-bcca-4816-a33e-043ebb2fd44b.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 0x344aaa3fcc371225cbd6ff229b5d44ac50955dfba2afcf04d8cb0171a4fe8cd8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DELG71300572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b026391c641a6c152d9c50d3d87db3c42eeb36bcae6f72c2e1558fffc3b1db. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DELG71300563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db4a0f47c212f9eb3bd17b798d374427a72133f486ee47803d88c5f9a89a1b. 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/DELG71300566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaa0fd3d346680b6d313007b82e175eb35702b397a579944c2c09c15d687805. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DELG71300568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7406346a1562be120c8758af95e96f010b22e09361d23481752fe46a82838f. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DELG71300571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942caf4ec1e782a9b52f1bf9380906b57b7b7e1ef69bcdf1407bddffb26f2661. 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/NLTH62400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767668b1ea605776c9e52d9f598d7037b69f4511212b62bab76488576f739b8d. 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/NLTH62400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d3c732ee0b8ed0d2e683b9d8b9d9610780ed8f4063f45318d9d16442a17c3c. 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/NLTH62400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9ec992b9ecce910a4c88b26b44de9fc416d1b18b4371bc7399994b703b81d1. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NLTH62400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942caf4ec1e782a9b52f1bf9380906b57b7b7e1ef69bcdf1407bddffb26f2661. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NLTH62400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5cfa33963cd7adc27674575179c60fab56245e3938f5c77bd1710767526e75. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USYLM2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5cfa33963cd7adc27674575179c60fab56245e3938f5c77bd1710767526e75. 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/USYLM2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f603c23c825f4b737247136bc582a6e601c7ed7076fa3357e4134a758184ce. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEPL91529360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c25d3943384c0ac942060fcdfd7dbf31643c6ffbc515f11750dfd4800375b5. 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/GBEXH2100066.
Roller feat. Function - Len Faki Interpretation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb60dfb778c97b56274b8eccc7cc39aacd8d336de1c985144a1af8f60d5b41a. 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/DELG71400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd170e4965f105aa923496faee64a4b8ad3bb9e999af4d2f6bc911545117ede48. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLTH62400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767668b1ea605776c9e52d9f598d7037b69f4511212b62bab76488576f739b8d. 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/NLTH62400018.