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 0xb058cac255e1f8ee953df2e2f44647efdf43e160cc2303641d94da7c3fafd110. 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/54d00595-c8e6-4773-9221-763501afdbc7.json and https://artists.proofprofile.net/proofs/artist/54d00595-c8e6-4773-9221-763501afdbc7.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 0xf50302fa8be309509650f90ca73d89ffe13f23967c0bcfea08ad352e691d1a51. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX5MY2339274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0a1e66154c53a7a82b1f276ea0b7e8f57f5c8c7cf83a81c8842268275999a7. 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/GX4R52394588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86e42a7871c961c9c0f2fc6fbf42ac481520e633031178626db733edd88b8c3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GX8LD2330358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8d15a67ab1672efe9fbdd8611669c0d2ea396b6001a356588286cde0395f9. 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/GX8LD2356475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d51a7f2e6e174062f243f0793214d8a8306627c554149251e3688ee548affac. 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/GX8KD2248746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cfcef665c4169681e87602e7841fec2ba1b9be46495aa316ea96eadab7c74d5. 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/GX4R52204592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc42783c8dbd8d4f2cec651d209ec9cf34c4712ac2300081bcafc5cc011532ff. 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/GX4R52147564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ac79219b26743cb9779f68cbaadaeae41cfb3356d5e20edfdea3ada2a9b65f. 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/GBSMU9467695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9a56da46ce266e472ef25b22d489c04282ff9b61b878796cecc7de483a553f. 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/GBSMU8658782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7db5a14e8f99ed28ffc969fbdaf1295fdebe8dc39dbffcfc27bbfeeb0bde502. 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/QZH5E2042833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcdff943c295aa76c20255e4010ab29f88b9278b9ad89da5882b81768611ec1. 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/GBSMU7611532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0aebf35948dffc63525be5f6f4bfac5ab0a8d38f53bad365fdf81d2466cad7. 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/GBSMU6839109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dbdf3f635032c5dc0da64da18bcbe0744a819f108ccb4cfa15adeb9276e7c5. 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/GBSMU6037409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e85db9faff355c1e88307384a389d0e7c8301f82e66a3cbb6370aaa5764ed2. 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/GBSMU5929942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d2054a6e25a83fd2fa88974fddb80b7983bad6cb3acacd4bd532b130c9c7d9. 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/GBSMU6383430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f07a7fd5dd5acba85b84050932ea4f7e95135d13d14e486201174d5e15a493. 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/GBSMU4566095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989f66e35576939c0ad389a50cd5e9393ebc9cdd12dc613054a70cec219324bf. 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/GBSMU4369372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccf96b9c20e5ed41d73be749f1bf7754552e181c1fec0934ec48028f7f18ca9. 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/GBSMU4355961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf0ee5c6b633191e8014eac246aa134bfa5f9cc1d4dd00d389dc351322ce895. 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/GBSMU4355976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff34012a659d95b7a04fcb9dbc20983c326af603981192b518b96f06b6e157. 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/QZDA72415385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0660cd0690f9b523f993546c3e52f48ce9734bff900189f5340431558c92a8. 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/QM42K2530402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa4e7952319cdaec99621a1c9641fcb72b96464957177f6dc0b55ce8fc49ae4. 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/QZDA82078183.