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 0x52a4ac72a2ac5749ede8b55e5c18309a92064a7538d339c7b98584d3d4ec08da. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20d9d372-9ab1-479f-97a8-070194ed9a18.json and https://artists.proofprofile.net/proofs/artist/20d9d372-9ab1-479f-97a8-070194ed9a18.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 0x554e23eaa58fa838f00fe40f3a481b32a9bf71a373b765fb6045318ba5ffb614. 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/BXKG22200543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b6c11ed2a5a916746364e4c21b44ecf8e35dbe67deb0704b92a2c1de07cb64. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXKG22200500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dc0327a1aef147427d40371cc43b41d54dc8ddb575b2b23737dadf8f221a60. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXKG22200726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3149ed6e9405bee55257ad7a2a4ee1f5458567fca8a0573c1765433b4b9452. 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/BKVXS2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e99f765239a4a8d5d6231e4eeead0d8a07454ff703c1d828a7e58b2c4771fc6. 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/BKVXS2400060.
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 0x58fc633e15a531dc0900782ea0612555269208059571cd90b4edd54b73f2fc7f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BKVXS2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85871c39e63e33a299c04a668c28544d57a8b6c7e06b8fcf2d06b4f0d8945c90. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BKVXS2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe579db0dc155435a29238a34d241388c3a841da3793448687b8633c78d280921. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BKVXS2400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6254b12b294b28302562a167bb034cdab1fa12a508d4206c0e1825713c0e84. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BKVXS2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38eca14a0c33d0961da23f55d8468eb305d9dc26d742d53c4e48d8987c42772. 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/BXKG22401903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e8afb1f6d55ea0039a9eaa61591b6ac33760d240d70fc7e45dea81d4f09a5f. 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/BXKG22400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3330173091786a175bdacbfb08b8cce9d01d7b48eefe48cdf38b8040bc73eebc. 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/BXKG22302515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9788bc81499f7d25d5b6113f233b9b30fea4e9b97dfe2e27e51d949bed8d8b1. 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/BXKG22201232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4596cdb6bc89043f5a25cc3114770fdc1c0ac2d611d9d1acc674b0c6989f7b. 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/BXKG22200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd138375b9f5684af0ae669053ab79e8829ba72b348c2b3642f596d33c5bb36a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXKG22200767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66963b6f8def7c8ef34a93f61fe087030e2d968f97076083e8dcc17a4664ac. 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/BXKG22200646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6eb2a36f4cfc41eb230b70d2293be3d1538926f7cc2ce1d2a997553939c44a2. 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/BXKG22200516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51f6ed574f800ea59e6b81ab03b617630c0faefc2025960d4afd4f1630987c4. 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/BXKG22200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb9359aa51282a8ee4fca09b993d224af792782f28ca796fb9c4c5ea9f8184e. 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/BXKG22100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e23c3b1b6d2e8a1de87a6f3942d6b92929c04ae7abbe3d8144afe28d7f51ad. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXKG22200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b377c3d52942c5741997f128e4ef6a4365b880190071a3ed31288483216c4d8. 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/BXKG22100716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee543c7d1a1b5bfbf98918ce4ab5ceaa1054d578f82c765e749eda411b89b365. 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/BXKG22100265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b6430c11764e1283ab2141dcb088516fe386b0f3ed6438e4a90de8d8e543a6. 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/BKVXS2400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf54d3d97cf4ffa486e646d99e1f8fa6f431805482edf03461f9caf55b142c4. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/BKVXS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c6041df341fd8485cf8a713381db0dac3a04674f67f75f8a8f267da03b2bac. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/BXKG22101179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5431f41c246d0d13184c59a6fda088c359654dfb4c0810fecb7b0cd775f5e865. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXKG22100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3de20139e1d2cb44d34a31d85c58d0d3414d97c86472b2af18b9ab82d2d3d8a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXKG22100057.