thumb|upright=1.4|Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style)
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 0x13fc89dd6a6ae2d1e1515ff7f5a8537d161548e3e21afceabcca37d7907b43fe. 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/9335581a-e40f-49f2-b3c9-65c7161ba62e.json and https://artists.proofprofile.net/proofs/artist/9335581a-e40f-49f2-b3c9-65c7161ba62e.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 0xb401c0eaa0e1f559e4faae6566d7ebeae781e5c91668af2eedb8fa66c6201412. 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/USA5W2100191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815534d5940702dc3f9b13537174f146b2ddcbfffb75d9e55d9378d56dc28bde. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA5W2100190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692913e3a17298ca9f5b7ee891bc38e43b31ce1a2fbc39198a8ff08180df842f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA5W2100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d52f57575b264214c67782f2c89b1b3f773fd6656383e536c6e2acbf65f4e. 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/USA5W2100458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337c21f3ac415f419ff1607d72c5eb786fbcd7f3f53935ace6c7bd3f5834579. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USA5W2100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6204225f9805ebf13972f7d58a4d07fb9a54c4897d597bf512769200d7e17aeb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:03:03Z), 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/USA5W2100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f525fbc50ef8c20da0b89966ffe5bfd77e592659ff0f7aacfa66caf0a58bff6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:49Z), 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/USA5W2100462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339857a40f9015acdd2b625d0ae063304eb27bc42420d822dc239a7ec8f2414e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA5W2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc3e1471a7d8785c197598b9c0ba17dea7a76568529b81c42740e3d6ea5bce. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:53Z), 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/USA5W2100194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854fced68bc6e3f7f7158cfa45de687ec82c8bbf62f81facc1b0d0b2bc8e3e06. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA5W2100192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb175fb9a8466fe2e545ab040f5521670abb33cbc0cc52484fb3b50c41e4871. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA5W2100457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92e6bce7f1075ed8d59f3083403a61e045f512cb55456bfa9a85c82a51b17b3. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:51Z), 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/USA5W2100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17abe99c224ac17a7b27071092d9bf2ede74bdaad6bff17bbeaef16c922a4ef3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA5W2100463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339857a40f9015acdd2b625d0ae063304eb27bc42420d822dc239a7ec8f2414e. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:06Z), 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/USA5W2200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720fdd85ec1fdb4e14af9cb998724ffcde25f3fca69e146e925fe2a21fcd4860. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA5W2200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd051ad85cc6efe3bbdfb9a1fec2308cdd90a10851677c4dcdb893ee640ce4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA5W2200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d358cb2bcdea3433d3691e9ec245ce376f9aeba3b6f14591e35a132e05e799a. 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/USA5W2200929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecd051ad85cc6efe3bbdfb9a1fec2308cdd90a10851677c4dcdb893ee640ce4. 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/USA5W2200930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4598e7c6bf75f70bec96abcbebda06b388cf2b53182ecf81ab273969c51a8ea. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US8U82000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aca19fbf313e09bbdf06997279d7a6a257d0abda5954e802df4c380ef89733. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:50:40Z), 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/US8U82000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc1f63fda72914d88ad9474937e0d3e22eb29fb4ba2de7a1371d6a51e81f171. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:19:08Z), 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/US8U82000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d04cb643a103b7d058df553f806f8a140cadc61414787cd99f369ab55e52d5. 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/US8U81900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22142456705d811e89e99b6ded7f55bc114b6138775a926e9ea3d2cea9419a5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US8U81900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a00010017b299e7af85d0ae63ce471fe87bd87ddfaf460d2bbfcf32354bb46. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US8U82000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3540df9bce8086474ab77c9dff373b54f1342c199275b98e2d698bbfb90652. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:43:57Z), 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/US8U81900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dda6c029bcccce30ea342b8418a042c1c5094b57a3d82dbec7631f138b546f. 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/QMQ3X2402094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5484edc4c3d79f3e9a6990c5155e4a478e54855bc076acbf69ef5ab130ef86cf. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QMQ3X2402095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22142456705d811e89e99b6ded7f55bc114b6138775a926e9ea3d2cea9419a5. 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/US8U81900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b2deea4413d7d9ae5362e1f7760ac8c5fb5a75850c4986681a5862f9869bf5. 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/QMQ3X1901216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a51912a0bda5c0d7f2d021fd7905ccfad54079aca83d3c3c1375034d834c13d. 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/QMQ3X2001326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22142456705d811e89e99b6ded7f55bc114b6138775a926e9ea3d2cea9419a5. 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/US8U81900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e123d97b555d416c2500a257e9d302425f70bb5b83f9a97208dd1cc0afce2aa. 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/QMQ3X1800959.