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 0x9961c93fd8bbd9c9adeef545865c48524e505ae1edaf85b681f1fd85e5041a0f. 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/a129028f-a971-4a85-a821-0384e71f0dcf.json and https://artists.proofprofile.net/proofs/artist/a129028f-a971-4a85-a821-0384e71f0dcf.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 0xe32948d4231d3436184c86cffb4782813d2d53d0225e505adef4246b0d6ea88b. 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/USHM91843540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d19a681c6f73754ebc612efa5a41135d597c742d2e6be897c17501e7f91be4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USHM91843542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba78fff46a6a89c320dcbb5566eac6b63b0a8ec34c39533a86d31dc1a22aebc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM91843543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f150fa0261ece3833fb3d6e04945b0c41d565c70fee9a3d70322449732b7b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USHM91843544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a7b34c51d64774a5ae17d69642462f778e2ba023e2d484f244dc75d375303c. 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/USHM91843546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4430ef146793c2c4748a07bc4b766316162fc72d046d729881c06f97e4f994. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USHM91843547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ae46894f06d672910dac605fb4e8582197ae0427912e84061bc23f057fea2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:18Z), 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/USHM91843548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1225552b3d8ccaee5ef4cc2a43b8bda330a46a87ad1db49ce2b958c44e134818. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6L2417235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5d254eba3e2444f275468fda631fdb663cf7ac3d1a277593f9daca876550e0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:59Z), 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/QZK6L2417236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4801dd0f94e1566935b360509d10930206fb756be911f92f071a0fa3c47b984f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:08:26Z), 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/QZK6L2417237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821dc393ed58be01c9fc6c292ebcc914515667fea1c4232049ace8e0b1b2ca9b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6L2417238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a141e8bbb260830099a077c280339e30963d17b7309a03918e974f7e3c6da4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6L2417239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d568ffed1c1e71347aaed640d602d2251b3fb17b83329b518fa85e90525abe1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:30Z), 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/QZK6L2417240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11000e025519ad51cd355454f3f6e7f66d658ffe53d5aab153e7ac651bf0c4f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6L2417241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b51e748b6a165c5c2fe7d7ec9cf0c745f1f4e30e81bb25992f8df19a37ead2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:58Z), 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/QZK6L2417242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adc50929c13eb40f63cbc33c8f8705e89da2c43bb0eac7af7a5b046e78cbfa9. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZK6L2417243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4498bcc91f29039335c578188a13eb23bca991e699e43d093f5b94f36734ae68. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:47Z), 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/QZK6L2417244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0e985bc7abb744cf33445096ef20cc48a13ba0439faf1bd2ee95240272e667. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:48Z), 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/QZK6L2417245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1821464c1e14962dd39f17bf77f6ef5521e6517537d705c54504da0d0900bbba. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:19Z), 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/QZK6L2417246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc769ceb7f479ced9881876b286307e4d79b2b1f5ad4821ece65d838636f22. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6L2417247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5d254eba3e2444f275468fda631fdb663cf7ac3d1a277593f9daca876550e0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6L2417236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11000e025519ad51cd355454f3f6e7f66d658ffe53d5aab153e7ac651bf0c4f. 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/QZK6L2417241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adc50929c13eb40f63cbc33c8f8705e89da2c43bb0eac7af7a5b046e78cbfa9. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6L2417243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1821464c1e14962dd39f17bf77f6ef5521e6517537d705c54504da0d0900bbba. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZK6L2417246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc769ceb7f479ced9881876b286307e4d79b2b1f5ad4821ece65d838636f22. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6L2417247.