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 0xf0c61cab352c5c682da815b71a3be087adc65d5f78662a31abbcb23c956f7881. 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/39ab5892-19c6-4666-83cf-799cf45e0868.json and https://artists.proofprofile.net/proofs/artist/39ab5892-19c6-4666-83cf-799cf45e0868.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 0xefc500eebc4fc353801a19817e622f2c592f7a66dd60772c166acf92bec60e0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL9RX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17f184acc7229bbbee62abba7ce1c1d728261c49db5566b551db2f1a0d6cba. 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/NL9RX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3985f63e5516f0fea292cb67a0b5a10c3e9771ca05fa1a218081614f19691c1c. 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/NL9RX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0206d16d90ac3d363188abdfdb6ae74e3f3f766f97bf6bbf12c8f2296c35faa4. 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/NL9RX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf0ce8e4d64d9b3cc58d95915cf24f572908deb5d3cf298af84af64a456924a. 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/NL9RX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4867f624c3c45702bc4d2399e732e3094d8d6cb0f77dcffbb9da4135fc3f2ea5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL9RX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d4234580e9d5cdd056680ce93ceb1a9c6ffa0edd5397eb08cd7c65f0f9503. 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/NL9RX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b113de8b30a31343bd9a5577b63575f585d9a37e1f633b8467bf3c4dd1ea977. 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/NL9RX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998d0e042c99d3ba57b34f6c1c76f9a1ee5809ebe453666616370a885db8a440. 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/NL9RX2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb247904ed3b11516d2ff08ae1a9bef1783772725ccdd0ca626220b1f0a1751. 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/NL9RX2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9005612c88ae74f7aef1db7cf6bcf047db2ea3db2e2bca67bf4d7ad9cf0590fe. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NL9RX2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4867f624c3c45702bc4d2399e732e3094d8d6cb0f77dcffbb9da4135fc3f2ea5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL9RX2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742c6064e1ef0fb6592590dc878e970e6eb66c2e46bf347904f1f58934e81321. 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/QM3DF2218438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ceeb3fc290827c159c7982e33bf586d16ba9d9ff165aa77286784d7f83269c. 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/NL7MK2200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f290b7e0bd560c2036c6f563e95953483e4da0f6bcd2729a5177946bf4dfa46. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL7MK2200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d56ba7b48f260d4db1282f1a1e7685cf448ac0877444c3a5facac43ec35b07. 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/NL7MK2200109.
Two Step - Klankarbeit & Shirazi Reshape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7bdb331d84a35f8355ab1d0c2cdecb0bba8a81b58de1979b82a9746abe7bab. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NL7MK2200110.