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 0x4804ba3c71b5c6619fe9b25db3be287171681be8fe767b74de55b47dd0efcb4e. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db170823-a4c2-4079-bda8-4e473280e69d.json and https://artists.proofprofile.net/proofs/artist/db170823-a4c2-4079-bda8-4e473280e69d.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 0x5f8ddc42d51f35ba7a8ac4b090e649102f40a6d15b7844aed9376ef485543076. 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/GBRKQ2229746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67025d31662dc81c74e7103c70aa51098ec8c1164b79135bf904c65963ed2d4f. 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/USA560526689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caeaef211858382ba120b5a577d46079061f10a590c8808277dc0c31a71f3a4. 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/USA560526690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559aa978b0151c3c4bc2cdd4171e009ed44dc1365c539f07e38001bb9b718fc5. 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/USA560526691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d3bee2ea7e28172839d0a0175db90ef1a882cc6109f5ea5f7ac15615a1cd5c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USA560526701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf680ae504e2fd938aa70de4270f50b23c5d0e5c8d4c53472c5ea419bdfb771c. 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/USA560526702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9f41b4031b40c24e8624e13ef1100d61c09cd1bf3c2491b0a4a5d9490ed055. 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/USA560526703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc040c0d7656c3ab98e8ea48fae937495e495a3ce678e0ca67d06f8d306202f82. 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/USA560526706.
Lunch by Any Means Necessary: A Benefit for East Bay Food Not Bombs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9681716e661d8983ba0f9cb71058a91e2528307e9a13f6f8c85726018435a7. 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/QZ5FN2268279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2872679951d7ec188fbe25b3fa256a261746309a2bd3170d0d4daa253f554817. 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/QZ5FN2268280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391ca8bc5e382688f21e539e3c8c22b8f3c32b4f3fe95ffbf514c940fbbc24a9. 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/QZ5FN2268284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afa11615ae86d60817cc194c9c82127bd5d58a2c6e3eefffad9083553deb232. 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/QZ5FN2268286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde8a89000a8e7fdba7b932e686e1729c218ab1fb69e2748520be8d19c884ddf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:28:06Z), 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/QZ5FN2268292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc0eab89d2980c2565a3a319efd238f54bba02422320fad7c5fc0c0c8f4dd28. 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/US2A90407007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d2b3664f1a78b0cde3ae37f8e38c4a3f0a6333227f3dc7d35c1003590e79df. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:34:55Z), 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/US2A90407011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0585af55ce900f9eb2360cfa0a224d047009dcd9017356ab4494379ebac18738. 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/US2A90407013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde81e779a30550346188358a524170c2dd7a3508a5fd224d535daad0002e8f99. 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/US2A90401601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ee4654e44886f5e31dffb9baf3d93029e37d7ad589ad58e3ef20fe6d037a2d. 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/US2A90401604.
Punk Rock Halloween - Loud, Fast & Scary!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5226a927a3e835f5e4d1df14c3ee499aeae74b090b05908da128f37a32a3b4. 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/QM6XS1902145.