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 0x11939e7e9cbec91b2607f46719f15334bf6a715b3249717a75e24f72affefc32. 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/2000cf15-8eb2-4f16-b925-b5a4833b8a17.json and https://artists.proofprofile.net/proofs/artist/2000cf15-8eb2-4f16-b925-b5a4833b8a17.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 0xda751c14169afe4040b4afee02cf341b8b7327d2bb01cfa4083508e56b9d0fc5. 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/USL4Q1747361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9d593bcf3a1553c1040f08b4631e56088cf13aab5a1c23d1966b43aa14657c. 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/USL4Q1747362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e11005e8ae187fed611c79bd39b5bdae49ec65229c912bea19273c833af5b2. 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/USL4Q1747363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bef5a1d67e1a53b1c3d2dcee07eb027b5246b63a691b1427cadd8100b31452. 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/USL4Q1747364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b006dacb88f0516475df28d32a7532d0706b1554b4272b9730232826d39e053. 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/USL4Q1747365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda774411b6c57fb47473e7f19bf53d97ff049b749e5081a3a6f84059f6e2528. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USL4Q1747367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd56a940fc5de1697df83654fbf89bd8b3794b7f166a9152d734270ebc35fc3b. 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/USL4Q1747368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6610aa16e1fc540a044f9ff0f1510ea13f299a3ae02b59915dc563912931723d. 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/USL4Q1747369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09646e85347e32865ea82c1dff56b1dfc3a451623cf074a82a36999f17acdcaa. 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/USL4Q1747371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fc99ea78b473eee7b3ee2da519c38746278be818b7114f4a7e8e0af5d85f59. 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/USL4Q1747372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0ae5302ef4e5b6ec30436e92481fd9a053dd6bdaf88700787b56dd41a636d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4Q1747375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1415bae3fa83dd7a0e07186529b64b04f6121557360bf6f4f42ebbb9b798e74a. 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/USL4Q1747376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407097d74b67b57ddf08a57f3081e8e043b937de649d88ed049c037765885b7a. 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/USL4Q1747377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5297520a75d2e98982cdf83f86f748e6f9c4e107a190eed28375a66a5f14062e. 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/USL4Q1747378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86978fa5656dd2aec29567972642fb98ccc8dd57945aa07fb9f5f0c65b1cbcd6. 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/USL4Q1747380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819f2f81512d0b299543490f9c2189b83885ddd8646e7eab180877c950e32bae. 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/TCABY1485252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65001862a5790e20ede77c200b17f73b20d3903c7897d0cda3c47dab2b760350. 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/TCABY1485257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934eba48a37081b7cfbcbd726173506749231c35537e4c6c496295ca9408a33. 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/TCABY1485259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ab432d17bd5b5cff7e9ba1e3074194b3b2ec81eedbad1e7b6befe6a219d0da. 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/TCABY1485261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2405fc6beebdee7e52f9b7f28f1412595fab3f3ef8f1306d3993c756ba6075c3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCABY1485266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b12bcb1caf306c301b2f7ba2cb0cf60aa06c8dba0decc0240f87d13d8d436e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USTCF1065273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236bd7f4ea9a70af3b027f0a3c0c2419d15a448ee89276535b6a7d1f56415f39. 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/USTCF1065278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe449c11b20067ed10bd43683ac0d9f33e1c2fb4c35879b8bcef0b1153f2bb3c. 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/USTCF1065279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c37350015b4ae559fd8d6c4a0b08bb98476b151d836eb896896f0d269cf97. 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/USTCF1065283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7f5886025c9e160f2bbfc2cf703c976cf418d879a08ba4180126414b574a79. 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/USCGH0772374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7669827e4c7dadb42e42257118d00375accb45a30318973f41f5315f37bad. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USCGH0772375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f135e33b64755c78d0044d43748f8809bdc44f6a6f6ff7f13d21e8b12a74781. 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/USCGH0772376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff613a3c259c7794a8a89c8d241c73e43fcdc30046fa12b8e3f63487cd3da32. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USCGH0772907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ffd27d2d7eecf1e6004ac67efd8091a67b6691c850d144dac79e11259a51e8. 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/USCGH0772908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ab1811b5692c2bc7f281fb7b69c95c9eabece0fd1529ca03fa5bddcc66f412. 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/USCGH0772909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29f5d57523aae90e80a08598505283a10e95a76e02939508d82e7c110694719. 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/USCGH0772910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9f926e9fa1402d3d25930c91a6289019fe16332e73abc8c0e456fd80b177b5. 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/USCGH0772911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f248bb7e5d0566bf4471fa85e1c9b7a0df9c39f35b642c85eb40ddd19ae975. 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/DEGC60800327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd324489fc316040519b332ac3053d7f4e53d6b104c13c4d8455e9b75b6ac646. 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/DEGC60800328.