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 0x2bd561616aa4aa931a83bc5ebdf7cb9cf83a2e39625710d82e8c057a89acad4b. 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/4861cba6-9fba-4c00-91a5-de806406af4e.json and https://artists.proofprofile.net/proofs/artist/4861cba6-9fba-4c00-91a5-de806406af4e.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 0xa8fa6ad67ad96a7f8bbee9aa48ca66c85b19204fb56b1d278fdc1eb2d3e176c5. 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/DEPI82302256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d18483c317025717065ec51c9f2109812ee51f994d5f593b176b90808a4f3. 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/DEPI82432512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9280793fc3d6672153574ab719d55e7660ba3b3feb2ea36f51480f6dcf6ba6d7. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/DEPI82415387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4879a3fe9656ec1144e0a480dae1c747cfeadff0a4f9591346915fd77fdb684. 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/DEPI82415415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9f8797f7163468084b5b532e80b72da753513158bb7c3b79deba35ae17af75. 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/DEPI82412328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa105edb7d030170e42b0cd379038eda9846848dc5a9ea1c7acc74df460eaac4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEPI82416555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92110ac3604620d5082779e460307bb9144f9ac1916313dcb83c7d29cc26c35e. 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/DEPI82415405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a3e302652639aa1226bf530cc8685ce8ea7d9a33ac98b44154185d1f191a2a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEPI82411772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00609da8596972b20d65b6768bf6ac90c141efea04e6ec7a52faf4cf2b9f3c9. 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/DEPI82422555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbede8a05b7a74a2733b0608daa0e6d4df9809257038319b76c3116c94b300d. 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/DEPI82416456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f0c7800a08a4d2b8e75c320e09aeadd6a6623c365603a201f6a1279b7b496. 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/DEPI82406783.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4a10922112e4678433294f1a7ef7bd87169f68e056e7e4ba4cd2f3c599bc5. 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/DEPI82409937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb698bfd748ab3e6030cd34174c27ad808ce58b148ff858067012f23a2a799c. 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/DEPI82418610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf067264f3dd4573ce078c6dd763450b9a14c0a1b1df254fff350ddc40b40b. 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/DEPI82408804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1756a9ec1210d168bf3d605d650defebce144048394481e6ef98a2b1577b9d. 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/DEPI82407200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f7bb9aeced75927bc01de59923006f16a7688b149a6c679b15a18d633c5b7c. 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/DEPI82404747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17569465d13e317ed637dbffff487fbe23df900dee4888ec57b9f0750277f1. 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/DEPI82405741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d98c6fc208de15fc67d4558d48feaf7e3e3bdfda8324a29117860221d08296f. 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/DEPI82407568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d28f74f0ecebcd79062c30a0c7fa1b35b6881c4e84bed8cab7fabb019ea0da. 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/DEPI82411409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2eb912cdbda12265585b6b5bd0d7858fa72b729187c023dcdab8173fe4d930. 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/DEPI82402693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27450cc5bed59072f671cfd93c5eaa14b286c0c7de45fd6b8fa38cb6978741a0. 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/DEPI82326863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfeeab3ea4687e23569a6c00a0b106b50dcfd174926af3a4bd82994bedce46e6. 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/DEPI82404745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644d8fda28ca0e5a862bf1a2e285a999b6383bd8a39f46d31f92488502341e99. 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/DEPI82400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099e9777dd714d2362fd9fccea4d3815bd5e79e0fc91350fe32027403dc2968. 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/DEH742503584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab1d695b0fe2578858841758df387c74e9fd3359edec268b0a382b0fc567c9d. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEH742503585.
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 0xc2dfe38811ff40097f152e4ae2102f0c0eed97245723e428132bb2f9d2c2cc33. 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/DEPI82312479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b4956a40fc64c44ad6fb12a95f9fca2f574f6fda88d952ff9ad34f56fd40c. 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/DEPI82222323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62865d367860bf34f4bf197949d5bdc2f9f8094ca62271538e3c32a5a862d592. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEPI82321724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9eb731e4da28b3a75ef9be3da1fb19e4f07ed255db281e258e7a7e58f4087a. 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/DEPI82321725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001b7f0fee011dc6196ffe75448462677e10300433ca18257a9d3f47de4efa50. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/DEPI82319667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3cb24678015137f10d3f15ab56a20202f7456dfbde2ba94357b135628a7a15. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEPI82320340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5515134425e9a9f6290e6b4ce3f00530d2eead9e9bc694c8802b96127cf74d17. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEPI82306705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db791f3e4655cd7ce30ef13b586161260600681ef7296debf23fcc4d2d994b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEPI82301901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e854f1136d7f34221409dd90ff9a287babcfc865d277201ea68c806d0e92fc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEPI82206919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c914a6f29f1fc02d0716ff0b65ee61f13c65226298200e0d1b3616e89d7569. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEPI82326680.