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 0xc9ba50847447145e6ae48d3a45aaca4869ad8519cc4b225c9ffb02a2dacb256f. 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/8abfe201-669f-4ecc-a74b-275d88fa2fa9.json and https://artists.proofprofile.net/proofs/artist/8abfe201-669f-4ecc-a74b-275d88fa2fa9.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 0x68e675a0ae455f6c8fef3483dabe444cbbdf00546a36f47b4b708f9043b98df8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:29Z), 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/ES51I1100856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ca5197b02bbd62ed18f16cf6acbbf8be18f7df6dd0d2c31ede996bc96dc4a1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES51I1100857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d92e24d45a3ca58c0017f7ce3c24b438ee0b37513a215d0877e448d07d6945d. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES51I1100859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a071e45552c9b01c89724e4736931920bebc22899a3c96926f8c4b29defad3e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES51I1100860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607e5b18eefff9a1351b2d6bcb14a75b920eacc06b2fee127e4dc8953c4ba26b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES51I1100862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3499f9be6d822d4eea6b191cb865ffa8007675ea55612b8f5af60ac768dff6ca. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES51I1100871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7dffdf02314efdf92da4f19b16cb731e41818a5322437a4e5ee80291bd6c9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:58:23Z), 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/ES51I1100876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5f400a734e2a89bbf24ac8547826e47466fcd18457ec634466efb0cc48d187. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES51I1101065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547105bdc66848e75a3ed5675c2a0ff903d6032f8cbdb3b7c9ddb44f6cf3f51c. 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/ES51I1101036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e735aa2994be77cf910036cee8751bff73a754f31564089edd7dad459d6b9ef. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:11Z), 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/ES51I1101037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c06efd5befe65e99187072452f7056cf69c74728ed9d85e48132906386006b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:49Z), 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/ES51I1101044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefba5a08a4de1c6366cfa7e675bf84b8bdfd5c21cf30d51bd6436a1ac7cf89af. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/ES51I1101045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b5104fae8b7c716bf2c303f0c35d4a3d532287c2d03fd44981dad00e57a103. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES51I1101047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d8b326e4da599f3dec37e162f37799a13bd3cc0ce4c4ec84534f4c332cac78. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES51I1101055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86568a54fa483f7169ca4d392ceb3cfc634913f671a4fff9096e9af19d29e10. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES51I1101057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fc050462b897149e08a74f59540932e71ac7f97f39c093207bfc100df52089. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ES51I1101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d96188fe81a7a3b88c1bc780bb7bfb12e956320e4048ba74520a94171dde3c2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES51I1100645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d565e9852f8833dfe4e2f49b076f4942ffeb1094b7c6a58fa7b6bb9c7563a. 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/ES51I1100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630cf872d5235200ebaf3eb0f97f7ebb264070281eede5dc74f7feb05352d3a8. 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/ES51I1100660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d991e5c28be29fc12d72c0ee6a354a961ea7820c0098de327a8ed250ca525d. 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/ES51I1100665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49ed33263868c379a502ae7d353f7270fcd1422ea8ac3cea1e8c86734de2b22. 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/ES51I1100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7ba030f3bdea2717f20db48e395fa11081a87cbef520b8163ea30d58e765e. 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/ES51I1100585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022943ba0a53be1c952e8fac04f8134bc82a59b70bb2743730afcb848c3f1bc6. 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/ES51I1100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4771110d335896d1e1fc5e119091cf42b9010da981ba7cb018a5750dc7a313d1. 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/ES51I1100595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46de0095802be2505c544154fb7ef36e2aa07091ef08f5f4c8fbf93f90b8de5. 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/ES51I1100600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2afd55cb82fda9369d15a3138051656ec9f3f92370b044c326d9230a385af3d. 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/ES51I1100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d2d37ec1c6a85fab7cacdd13a0a847f4826568cb5407c3a1b40ef1405b9791. 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/ES51I1100525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c404d5e669e241883a7149616b6e3a18f0a11052b4a9b720f994880e5ea1af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES51I1100530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f147d2c1f60e3607b27d7bb2ace941495a2794f27fc93577e04dfd3ce861e06. 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/ES51I1100540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2deb9cf9bb422004d69e333ba8a4b636ffe919fc520df01337c6e785ea2252e. 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/ES51I1100545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00e004f40a69235f95a0283c2b0a2328f202af6596a662fbf70d88fcf8f2401. 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/ES51I1100555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a8a9382cd5443ef285ce7404b33e81c1c0643f528daccef5fc8fed4a6f1aa. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ES51I1100650.
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 0xe17f34038fbea5b34c50445f1562f49bf96a991493a2a71dd3b33e87fcc3b0c3. 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/ES51I1100605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf523769573a5252befcd7981cbab7ca49d7e380a11ba726a27a8cd31e2715ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES51I1100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27db86114259bbc4fa154b94e84eb813e990a04d0922a942b6ff6b829fe1e9. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ES51I1100550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463af8a64720f624ccebc7cbbdd121fba92d7bc4c1ba08743bfc23db80670714. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ES51I1100560.