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 0xf13cbb9c64775c4bd4a33ea9ce2504e93ab401373e3d45e4f5bc5d7f8c8c267c. 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/05b266f3-cee0-445e-9975-29a1146af9ee.json and https://artists.proofprofile.net/proofs/artist/05b266f3-cee0-445e-9975-29a1146af9ee.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 0x78c5a0bd1786c05036ef9da7e9140fc822ca48062b97ba85e27af9a8af0f64a4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USANG2427364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6701b9814e3be7f412cc2d0e940ce31e284dd5e4caa437a3e958532d6d015dda. 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/US3DF2445344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5108cf5d155386a7495b6fb57b9a4e5c8c76f6eb23b231003ceaf57310ef4987. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMANG2252989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca64758a9bf62c34db159cd0f2f578b4045dbcdf97a83e1a68d3f6cf5338eb29. 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/QMANG2252990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fe2669972abd2d4a0f099d89b02a991dc5beec79c5d1177de3673b87705594. 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/QMANG2252986.
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 0x2ff7891f13515565ace979c11291a7e75f80674f47614e90253ecbf3d290d098. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMANG2252988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613098d05e44ebd599758680fb302538100da3879b7df3264ffc367c95b9c39e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM3DF2264895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608891ad2e2103ec2a8a88a3c80f8c7498b1382b557de16fc76aee986eced36c. 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/QMANG2423645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb1a3da01c91b25addb1df8db7fe3aecb0716faa637059a7d4ef5f48b6e69d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2497347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83185a38d5960321d763994995e040ebb091fbe9dfd39048ed4ef2130a9b5b2d. 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/QM3DF2409265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bd1deb42a7a1b20d12be838d4dbf4a506a24ca5bcf9e04b01444d8deed904b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US3DF2488297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e484f63aaf7d832b399ea5ee18cf869faa0ef454c44f925cfa50441c0da3ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US3DF2436450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae06bb4d1612c4ad390e743a49e236f495d7186876a229c4997f2be5da3cb3f. 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/QM3DF2421453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28befb80ef3d5fae4e9706cd002880e1deeb60a7f52021ec0959325ab8970b2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM3DF2417438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68d43b259dfb2b69695a6f2ef0fa7e12b2ab903a90a86f5325c15d1e03a0057. 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/US3DF2444391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2240911ea272d0d5f544b318be0f1067d433ab89722001fea81568aab9d77f2. 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/QMANG2425147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55028b0f9a8b8e78682dc288cf5fe17d5d2d9989d571ab65bdf5e624a85a5ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USANG2480133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4f2062cb403cdfdd80a46c4d4c67d8a79405313c298b60f6f2c3e53443ed6c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USANG2427919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3079acdb64dca2bf5516bc62f3b5dec411b6df6efbaadf3f0a70022726f73c4. 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/USANG2444184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b261c1bd753df4b3657aad1f5d17856df810e19a0d53788e0ff03c77d7337f1. 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/USANG2458461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c335acc4bcf4949e3afae057e7f96b5e4d54be0aab23bcfb84f37054a95af9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2458066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4e5617de6faaf0fecba75e2e73c153cf33e4072d4a915078d6e1989ce175eb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2451114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365e6de7efae6c23c245f177998a1bf7a0992fa2b94e4a18d224f2b8eb7e8d43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2451115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb894ea40de08d8cda848f5375446aa81608133d025eedb9fac2b55834e5edc. 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/USANG2451116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaafa4db523a2d693893bd78b56a3867618a4fcc9cee04072503a9cf788d0bdb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2451117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083328af6a4790597759a91b68a48e79d5443e036a5ef4d13b14db697314dbb8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2451118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9035870533a4f0b5b4e12aaed972e6c66b2e61c62afdb2e1affbf351be9075. 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/USANG2451157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9267ee2e2b7f506eaead73a63faec0d09b920af56fadd20df8a93f8e1b9203f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2451173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad89c4bf67c70f486b697dc929c27ed0407ff22568e077fdec966d5450625798. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USANG2451291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af369d79a963b6828d5ef73cdf304a0566ad72ef51a4f98214e800fd56ca65a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USANG2451320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa45ac3b2e0aaf8b20b47b43f49a3d5f56f11534412e1c48039f27ad3afd3f. 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/USANG2451324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae0984cd3bf3e663bf6f0744b79dc07fa0ad95873efcdedd9e44e3ec895df68. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2451326.