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 0x80b9e01683c69e250f2b5ffdaaecbcbe17d40a7c0ba2d9a2ebdbbbf844bfbf28. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a9a7079-3cc5-4ad6-9778-0dd07768250f.json and https://artists.proofprofile.net/proofs/artist/7a9a7079-3cc5-4ad6-9778-0dd07768250f.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 0x09c9e6563060385c2512379266df4349077b5c65ff1142db4d74b877e3fdaa55. 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/SE6HN2424567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa63b0fdbe9ae8fd96c3f701fe19a1d74092bec76da8d6cd6bf40f1382abbec5. 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/SE6HN2424568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dddc5c0b3898ef72068de8bed11b5667f7eed51de97262a1042f14ef98b00c. 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/SE6HN2424575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a070b74c1c472fdc240274b5989eca774fd3c26137ce5b715d0f5cf0fa1197. 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/SE6HN2424577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13708ba63d0c131e91e1b49269dadf0816966070d8a99649ab0f8abd593ca604. 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/SE6HN2424578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130dfda5d4f0bacb256c7705f97229a9633fac8caab49314d2bc31c562d152c6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:00Z), 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/SE6HN2424573.
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 0x7707beb058aa7f4a1900363d9b9b72d169168c67db613a6a761e21f059df2cac. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE6HN2424569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df7737f6dff2022b5fb21cb963b3251e3cdc2103091a26663d3a2b2ad513cdf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6HN2424570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59613292bf0cf634283ca312a249b24827e25a45e2a60822a077a56b957d1ea. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE6HN2424571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2217c69efa0665aea827b32561502277fdedac6821522569e59ba08b1ca91a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE6HN2424572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9949d7e808b1db7337bb878cd7378143496059a373916045582d3cfe4daed1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE6HN2424574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777880f291b2fad0455c72d969862576ab2ab73592d5e739409926558c11c911. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SE6HN2424576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec6916151893491e67f9f38ea3a874c6959ebc169602fb74e2bab593cf41d89. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/SE6HN2424579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4cdfe34cedba2b5fccdc53b3504f447954489054dd361d1b04b11cdf3b30d6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/SE6HN2424580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6775e2e62e664b45baef504f64d78362822d29f8b5869ea4814950134300ab1e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6HN2424581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a92e125d92482e5cc9b34676118f9cdf29e8d3dd9a6656c221ae45084b55db6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE6HN2424582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eec4d5f0799e6aa2ca420d08edf65771718b6a9a7173840f42e295b3b3ad5c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6SA2406398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691942760e6a278a47cdda07474b8b45d729a7a7bbf63514950e1d13c5bb169. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:49:44Z), 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/SE6XX2597549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586a95c3f2cc0f95b6f9ccb1c5c7c1dc128a53bc64334afc0e7d348e691d8857. 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/QM4TX2594084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263ef2325888586cbf2c64f9b7557779b874190052209ddb977f064c84545716. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4TX2594090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddda6e0ffc7723d4d517df4a845c81883ac79d3ac0f491f704d45eecd2adcc1. 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/QM4TX2594092.