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 0xf22ee850a9fff4911f11fa8ffbce5262b1584d19ea1302541514819afa7f027e. 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/02d64797-1916-4fab-834b-71ea942ee508.json and https://artists.proofprofile.net/proofs/artist/02d64797-1916-4fab-834b-71ea942ee508.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 0xce2dce9832925c68d48794f6219777fd462f6ad1cc4a52502fe91d8613faa8e3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCACH1569252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0fc1e7cc2ef5b46c251ade8e5fd7e0d71dcc69889781a81b663a9f1db02930. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCACH1569253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66495a1d7b5a33f8505f73d187f15c73d795483590cb1565fdcad427348d0e84. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCACH1569257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5b9dfb5638c118e777ee0f8d105fbf458ccb49e805de91c50867f75212d35. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCACH1569259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff6f962365d51c004cc0eb07ddd4fca6db97218e448e6485badd45f7b3a2843. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACH1569260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc57cd49e1cb941c9151a5cf4b6e68e1e1948949dcaff239a8fd5ac34c84d4ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACH1569262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa138bf59777cf30b5f93e765dadc9ce96f76fcda8872ce26a81cb97e64e0594. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/TCACH1570704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6daa927dab1b09c43378ea35665a9fd30f4203c7c65d77b3f38e85cf6bed4fa. 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/TCACH1570706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc950b7cb49fce964615ee649c67bfe2fe17d84f6d71c70263f3f9b1c9daa8. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCACH1570707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728da43b475c901d0f9380f640c298ef76fa33206dddd491b0bc9c8d8a9e8a6b. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/TCACH1570709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5364a6e5053f694b5b2ec149b415c92b976d8693952e01e2dd6ad392ada173. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/TCACH1570710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf335fd8ccff25b85bf2b7f2e5690439aaeddc4a8c35d8f9fb9f2f06cd86b8a89. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACH1570711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3d67fb570126714cba7cca47ea2210c1871f4ad944d3edce53abef5f4354a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCACH1570712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74ba9803463e5e258a7df21328885bd290b716a0537dac6f6b309efb781d921. 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/TCACH1570713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871157c08769a523daa687da866beed1d2288188b6e91ff3902c615c59beb08d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCACH1570717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a88a922a90f7c64852134696d94b17f6dca37790c6c4a6c88f1565017c0b4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACH1570719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4367162ff95c895ec6e47d47ad32f40d285f7d34da219a166b11307c7045f63. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCACH1570725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef70505028b91159069829c0407a7f2e81e36f27010f4459ac18cfab7b1dea63. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCADX1862609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9e943c9240af932f454e644fd228f2ada839dccf13f4a31ce22b61d511c41d. 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/TCADX1862612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf983ed2490482fa4312e4b918725d018c47231c389eed24dbdeabe3c35e37ae4. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCADX1862614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4425104d873f36e90535113c3ffb4dc3f8e8067aa321519bac36dac0fb433a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCADX1862619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f616dcfe192bb1c6b2fa4c60243edfb2550a5814f547da873396d4fb8dcbec. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCADX1862621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc37bc9ff16047010ba6a9b77db8a3cc1c45e3c47b5854a11f25fcfc9a6b87a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCADX1862623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50e1b2ae0f4158ca20668f3574d984abf615dbe1a32e5ee801433fcb41c5e3a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHZ42033939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6768e75f7adb39832bea85c7a54c4481760f5adcc6234b8201db564f2d06efe9. 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/QM3DF2185951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c38f6dc24b9671d5495a0f8642d940f96bbe7ccfeca3ce07f0b088c0a257d53. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/US3DF2243202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc83b5c0023ea78f6fffb1f1dffc3ad5b27c67cc98213a5a717cd35842a7bf6. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USANG2217287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c30527372c70ee4b8b417d57b52525f73e022044f4e0fd15e1a7372c100d1a8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG2217288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717aa4d241d54dd4e1e6e7d6bd4b3fb40614c258146b783597a40deb063c7ac5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/USANG2217291.