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 0xcba50c4f1e3d0b3d6160e729ab3cab46c870a045eb09be577eed976d45b8d6bd. 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/37bb1021-af4a-4270-8b6e-94b178bf8334.json and https://artists.proofprofile.net/proofs/artist/37bb1021-af4a-4270-8b6e-94b178bf8334.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 0xec3b8bfa4dc35910a5c35f05101bd0525274e72b99d3f5d463aa0ce9d438e8f9. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:19:26Z), 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/USWB12000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42426f9a40ebff340880cc9802857b4295d08fdf8ab61715df3e77b3d871c33. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USWB12001942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660fbe68f1ab5ebbea4bafa11abf6463eb2cb68bd22a1a73cca8d01322d7cb38. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:06Z), 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/USWB12004424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890446d4a0a33005707d3a64be45f4cdfd3ab8766b3f5161d8f8586b2b0a37ef. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:49:55Z), 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/USWB12003756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4caef959af4be6c8b1c9d217074c5d32032cf5a3217bb753463a7e16f0e29c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:08:36Z), 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/USWB12004569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc96247666e472a349e4318cba9e29e5345f22d30e96840ea03ec1c4fddac7c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:44Z), 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/USWB12100760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc96247666e472a349e4318cba9e29e5345f22d30e96840ea03ec1c4fddac7c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USWB12100760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2812a072d8216a0878830d2261fe3b7f73873d329f0961d9044b5cd09d13f9a. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USWB12101135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3acc76db1f06ab9b9f11f8856780f2002c0774cf7700398ab38e49313ff6af. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USWB12100974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7619120ccb460f172b097f834b3da8006e75d88bad17fa0f7f15aeca2a5329d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USWB12100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa332b32db5e214f9ad5f8172306b520520a24469204c9a8883693afcc2e3afc. 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/USWB12101136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c43c8af078670a227e0494cf1e181d0770e9ed2e427c3f6ffe7f2a1b99b0e27. 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/USWB12101137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3b8bfa4dc35910a5c35f05101bd0525274e72b99d3f5d463aa0ce9d438e8f9. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/USWB12000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c5b71fe8dcc8669b2ca4121149a6f2a3147ae68adc8cf29a15a7af6e76243. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:00:48Z), 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/USWB12101138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaee18f37eaef5ea1b3a9478c38cc82f82a61c74b119ffd667894a72a43613092. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USWB12101139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64d604a0f7451cb3089b9248b01b68791f86e881a4bca82280bda5af981ac35. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:59Z), 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/USWB12003757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a9c83fce3862b4524e2832c731685bf7c2cb918b8b7421ef08ada9e1526847. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:13:38Z), 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/USWB12002193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e93fad5d95ae1a43abe1127f757e98463acff76c4c9920651bae560f219766. 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/USWB12003755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890446d4a0a33005707d3a64be45f4cdfd3ab8766b3f5161d8f8586b2b0a37ef. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USWB12003756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42426f9a40ebff340880cc9802857b4295d08fdf8ab61715df3e77b3d871c33. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USWB12001942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140bf9a3d0721e0281d62ecb0e65985e6bdc34f3e7ee22a92625b42ee54ec5f6. 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/USWB12105320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efab626d2a760b3b7558cc4df48cd9a337a2d855eda097f1ba62ee2bd737eba. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USWB12105496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc807b512794d352db133a4dd1bbaffefd437e3761c6fc326792a9059520ee89d. 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/USWB12303549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ee4bb7ed3cb898713c3ee791a1957d522c49df57d5d16d3fbbf72d563caef9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBGA2000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3dff9bf619d4bebdf446af205de6aa2fdae6bce44f982df1e562c73a5710ac. 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/USWB12300567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0aa7400f12763561da08a6e62f292e92a9947fa074f7f552bcb7e6ea3b09c1. 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/USWB12303041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ee70b26d8916d59797d70e78552917e43f112fb80b93b464d003dfdd82e29d. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USWB12101140.
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