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 0x4db6739f61fa701c58127393439f789284e070387c9366ce105820fd09d820fe. 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/6d4bb806-6653-43ab-8ccf-7b0e09ff2021.json and https://artists.proofprofile.net/proofs/artist/6d4bb806-6653-43ab-8ccf-7b0e09ff2021.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 0x792f981add00ab97c364b74f88ed6a51c9a0d21d5be26fadd9e7d5b5400e4f93. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BKGNK2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1b45c77ec75f435c0755e6e50f336dbe983eeabe5e0ed17b05768611cc28a8. 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/QZDA62436294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba8f00fcd2e45507b89e974377e2a209cd18e55de6de5630bd5ec8197dc4ed. 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/US3DF2469679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6ce88393bdf341f3937d2b68fc4d7b450ba2960e768a485947a76596fef1a4. 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/BKGNK2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35298a2cc8cc86dcf6716a4081186fac6b55fc7fa5216162468e66d78a27aa7. 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/QZDA52418354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543c9d46b91984e5a6668869c967bdfbc7733ed912cc4889d88bb144c249d3c. 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/QZFZ42449130.
Dez carros na minha garagem (ELETROFUNK)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a527955ad0e565468aba74b8dcc1c2f708876a19679e380232a53a7f3345d7. 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/QZFZ32448438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3ee8fdbd6577d38462e30a9c780803d523b1db78d83e0fecf1033413156e0d. 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/QZW9L2383977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c3aab5035fb3e4c01d3a4ff79b828eaf7aa69ad2160e36f26d0f04f0648e62. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GXBAV2370841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9a751b8ddc594e1b30a2cbe123a84c9ba3cd1a70dd2c0473f7cd3a195052bd. 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/GXBAV2370833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387a5eac10097eb087611cccb924052bbac5a57ad783b97c649f74411be554ea. 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/BKGNK2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e54dfe4b63ce5bf496dc250b462d0548ade5264062c1968bb18b6fe5823aaa. 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/BX4IU2350457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d4d9af51d74a9569b7b4c87e13bdf8adfac9685370275c4b6405627952644. 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/BKGNK2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123bf19ccccb5c5625e7d18aa29c48682a5aa9334a292a7b3868a1b3a8994d40. 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/BKGNK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdabd8a0c9e8c362b0e7f293b913d26e8a52371be5c9f3914f152700ba25a61. 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/BKGNK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca5239fbd3356191bc993adc509f43b99c827463b34dcb8733f789c7087c30e. 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/BKGNK2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bfaeba9fadff83cb118a16b4e121d07b5d2c467e243fc6e24fc54805cc809. 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/US3DF2447886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48048144f366c4fad214f38deece62114cc1e0f3cbba027bbe5a7c62b3b1dbbf. 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/BKGNK2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367277a58604a5d006513e2c6c98e724a84fec6d357c7b304a5d1f20c8a7f955. 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/BKGNK2300005.