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 0x873cdef72cfe57eca1b236683ac53193b38554320e24b116809ef551cb6c66c7. 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/4276f8e5-8ac8-4e64-bc42-26c1d4795b25.json and https://artists.proofprofile.net/proofs/artist/4276f8e5-8ac8-4e64-bc42-26c1d4795b25.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Goethe: Faust. Der Tragödie Erster Teil (Reclam Hörspiel)
E.T.A. Hoffmann: Der Sandmann (Reclam Hörbuch)
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 0xc6f5776a86d28888f049620802ada1b7ec9e6d10f5e5d52bca0347e82a3c6b72. 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/DEE861800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa330ab7ab38d9b0906f4807169c267dcdc78d686d3fa1267fd5aa3783ec794ce. 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/DEE861800344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb01d28b361888cdcc8b5b8195e6014910005e373759a43f4a0063a00c87848. 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/DEE861800345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cffd0746d0298fd354e372507784563616886bfc9f0a749a21cd842fdca523. 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/DEE861800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898c16f456f5b2e3be4798f8b29b899fd59b9fe68d377a74a80be84a92a71c81. 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/DEE861800347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f5f115306318cd07a92d320cee4387d1eef9f5a90eb175f7e07d4ec29da602. 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/DEE861800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f68fd208b41aafbd9373f36063699a2d8bf52c5bc8ff15d301d667caad748. 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/DEE861800349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684fbea08632d28bca718b1ff2d97e8a9082f8e7affdb1ae6a058463590760ea. 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/DEE861800350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674ec901357cdf8f3fbd8231a702b4ed81a67382afba7fda1770ebe2a19fb65f. 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/DEE861800351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37217e13c00caa679671baddf71a91e731dcd8c860c556012784d00077e36034. 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/DEE861800352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b7a8d6aa4e2496baae13590ea77786126dc0777ba5e41d0d05c9d0e3f8a7ec. 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/DEE861800353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf2cac176794b483c732afa4b679c1da86389d2ba69433593bb958b9678c392. 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/DEE861800354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868d4847572786a1e3eb4799f7145f3af1f652d7e970ec0661cab4d42b98e94e. 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/DEE861800355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d21f14a5b4ec4b0a966db39bcf123442fef673bacf6dda62268dab48d28a032. 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/DEE861800356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ae8c13903e869ee3b8dbbe6dc186e6299f163510eafbc7916fd58e3b812ae. 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/DEE861800357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa726461ddb094d5347873abdb90ccb56620ed1133cdbfce55d89e644814bc681. 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/DEE861800358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6764d8393a7fc39bb00c911becfdee84a85ee4ab693d677869bdf8fe985fde7b. 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/DEE861800359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62f59eef94fb00efa6825cc69e3976bed7d47d643b843a3c1dc59c8767d0721. 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/DEE861800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0ba48275f2439d5005ac2db027544c68ed8edfc4dd5581639b22a4752356f8. 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/DEE861800361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ccec6ee4d07275ecc6ded979f8968415476042c39f991a7cdc85be23e4f56d. 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/DEE861800362.