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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7908e1a00aca0aca071c24dca6a52023480018dd213a086875401ae33af567. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9cefea3-0c69-49a6-a1c9-6ae281eee76d.json and https://artists.proofprofile.net/proofs/artist/d9cefea3-0c69-49a6-a1c9-6ae281eee76d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce447232a053be83f5f26e76560503ad9d76d4bf770464de75ddf08e3ec1c8d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FILZS1000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801af15579951c1a5808af4ec58e578cec84ca82653ee61c34c70a7f8903117. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:22Z), 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/FILZS1000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0487f2f7470070e43d6b1cf5d2758386017be8fcd2c062ca2411453a995822c0. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:35:39Z), 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/FILZS1000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48c3ba38bef471abd84248622de12de73f11b27a3217d22b41d4b3bc3afb67. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/FILZS1000012.
Barefoot Not Naked (Ercola VS Velferd Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecacbdc5234a0aaea69f11ae6668d64751ad22357ed934f3cebc0bdda340bc7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FIWMA2100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8a09da313e84a247485fc52a79a50aa4f8daab80f32fd6c4edbb7d248f9b17. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FI9PF2500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db16abebb33f5660eca22ff11d3e043041427695a7700298fcf2f81f65c4c5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FI9PF2500079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c70fd9ff4ccb9310236fc2244f0f1ed5385f3f606a2af695f0a3b383672e0a. 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/FIBAR1100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab55ca14912c51e884c4336035d41062160bf0689272adfbb852992f5c9e4ba. 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/FILZS1000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e6884716d9070a38315c403094e66aa8b3af44bfc786e15ef98b075ce54b29. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:25:05Z), 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/FIUM71101028.
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