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 0x86c357555fc4f79d3c4f8a181fd578c95cb72b04cafddf6dea1ccc6d20a42966. 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/5a8a5bf6-3da8-4011-a39f-4f424a652b60.json and https://artists.proofprofile.net/proofs/artist/5a8a5bf6-3da8-4011-a39f-4f424a652b60.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 0xbafae14d38d66c056b09e9821d4479a6e6b4e0dfc1a85b34b28a88bedeb3a95f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USANG1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91efd470833483931a2dd2ce219f807eef6a3249e25a159a4284abe60d0fd7d5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX762118177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3115e58934349c62c4f3392cdae4059cf4a487f688cadfa58ac49b3f46fe1f3f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF1969636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c94596b7cd8aceae88c2916bca9d71cf3640f866a4f2efd9d5126c0e999591a. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/US3DF2009394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf645324a552cd52e74421304de1ec53d17d50765ffda52b63a9a48aa2aa68a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/USANG2008534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0da9ded00eda8ac8a762a9a2b1c540cdb463195c85342798c28d473e690636. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USANG2018660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db2831e70d99781bc12be4a2039a68af95f39811389f212ffed1f945663ed82. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872127805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea0c771e8c1da58b716a1ea91dc4dcf6144f7df10394bd1b40451f742ea0be1. 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/US3DF2154293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4ded2b43307f1a884f72a317c74ba9d206e796b80f4a0e94b09474cd8c2567. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2X42216601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9605cafe21d7bcdf29012f4eb98a4970377c9bd06cecf6dfa5a5a7a84b427aee. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FR96X2392233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91de86b1e8b7a144dedb880acbdba41425c69898e5012e83d2d05f27cf86fd. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R2314884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe956d80b00df8b08829d6b5a9c8b5b0e2e8113e711dd19c8d7c06bbb4213211f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR59R2374767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6808718e79415d0c105f984d67185234a51af324ba78768175eb50e05fae5b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FR59R2376420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de09b362d6cd5322b38e37b9661fdc5444c3c615fb68b401774ce7c0137ce4e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRX282428080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb6002846074396eafd61bf9fa2d6f0e29d737e9ca18a00c52ccfbf06b0dfd7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DGA062444268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a598e1265e7e7bde7e15f5cc64ce02421ea558af6a7935d66dea7e5e833b2e4. 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/FRX452389004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a249ed4678c3bfa295933cb3f3f87cac584d70cb0fe2137ff808e8a641cc68. 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/FRX452389005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40968f89d031d386c6f5fe178d6484710080936b0a99707c83aba10e3c16eb49. 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/FRX452389006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2088414bf7bb1cac0755ac356497d99d421afe5eeccc1763ff36514113931a. 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/FRX452389007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaae97cd52f4f61e0390265585a552a59671fe8b08c80a1a5e82b8d34dbfc12. 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/FRX452389008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448a2808ae4d48ffb286e1335bad24d643841e2cd175b1bfbff854f909cd23f8. 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/FRX452389009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c13966ba6af1e56867907a9df22ef74954558a9fd354485622261f1a54ada9. 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/FRX452389010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9018745506821cf3242c641e75b6f392009304ff329b2b4774eba751e9cdf9. 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/FRX452389011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837cbd1448c192f54f7b48d5d222bb86c6d30e315590dd6e198b80e0a235138e. 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/FRX282314046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b3ec2511699be555f6c77fbf52e36d375889fbebfe432c4bc925522e9ebb31. 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/FRX282314047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990cd8689c20e7446d243d16789c98286aa9c1c7ac5452b99b4d11cac609cc03. 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/FRX282314048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70681b7443d1fa55825a72b1bb1d8b706ba52fdd1471aa02cbdcd54d5a569af. 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/FRX282314049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804a7732417196d5b1d34f37488d475001e82ee14f3b722931dc2cf507a0ea8. 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/FR59R2374795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359ca49c9f80c9ca93cbd549bda9b011db28bc6b728f16a3d6b122114401bd9a. 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/FR59R2374796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc101a5b402bfb5c8f173cdac079fe330c72d91dfe4699bbe30621ce9ded90c31. 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/FR59R2374782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e229ccb67f99d9e5d0ede170c8c8fd1aaa8ce9d0bc065c5974c14dc0b6fedf0. 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/FR59R2374783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aa114c1a2ee1025016c8a7b2485a7a5709d2fac9e3320adc52a928a9b1ccf5. 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/FR59R2376403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6808718e79415d0c105f984d67185234a51af324ba78768175eb50e05fae5b. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR59R2376420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47cf7f6084f413e24a5ea95a5e822e6ba75cdeab179ff78fe480c477c9b587e. 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/FR59R2376437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc91de86b1e8b7a144dedb880acbdba41425c69898e5012e83d2d05f27cf86fd. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FR59R2314884.