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 0x352ea3f249402cd0ea811ab26f2404abc33377c78329b7ac2bcedc82e62a6c2a. 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/c580ea39-7102-4c14-a41f-8d828308f6c1.json and https://artists.proofprofile.net/proofs/artist/c580ea39-7102-4c14-a41f-8d828308f6c1.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 0x7facc54f6de9500b20de1fcffed0a4ece21a3b9ef5061f00a2bd521c4eab6a55. 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/DEVX52200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7ff61f9fa378724b467e193f71102f3018995a384afa33347ef199c93613ee. 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/DE1N12500034.
Proszę słucham (feat. Duke102, Stacks102, Skoob102)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da62b489f8c776e29971a51ebe5cd4cb453fef3bcf103234cfd24a218ffce9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLA552100222.
KOBIK PRESENTS DROPBOX: DIGITAL DELIVERY
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b29b77d7494a271eb28fa0c5c2dcf52e16ccd4a2bfb719153f4891e8dc517a3. 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/PLA552200779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754a85f375f5808cf0b28b99e553b9c9935603465384952f137c09c64c11f17. 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/PLA552200778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67da62b489f8c776e29971a51ebe5cd4cb453fef3bcf103234cfd24a218ffce9. 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/PLA552100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708ef5dc7375aab7dc0823befb57b82462217528577d50bbccbc9043441b047c. 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/DEVX52200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8491408d39f8441bf619c0b2d3e18de3c8b5e5acdeccf3abe5c0cb3f97c104. 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/DEVX52200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708ef5dc7375aab7dc0823befb57b82462217528577d50bbccbc9043441b047c. 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/DEVX52200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27e33645e728dc2aead0af4a45fb2e16307e3044c0dca16fdb1fb8172987099. 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/DECE72002870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472c8051828a62db3f3c96aa61db7f7fdad45a39dd9ec3298c676fab4e6ced40. 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/DEQ022004013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d7db51b82b4d40022dcf8249db1bc7e77fde53bbf692ef92fd78fcd58cf3e6. 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/DEVX52400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8492dc5199365cff30d19327534e0d64aae63489477457dc18bff3f50124760. 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/PLF241906648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb7b0e12c6f4855696f8d0e63e9e02beef62304a6e45de698a4d6cc07c7c384. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DECE72100996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20698309fc7ea5dc4488500ac8d4ab8fd1b649ad6da16fd6a5a9f022943e1666. 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/DEVX52400196.