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 0x59111a78673eb929142ae7c9512b8958f728f41e35f9303545ed7766ba5c9ef3. 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/e08925ef-7023-4404-85cd-084ec5d65abe.json and https://artists.proofprofile.net/proofs/artist/e08925ef-7023-4404-85cd-084ec5d65abe.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 0x132c0c17c6afc44d2bb11fa9f13318e761f12e0b1c3905a04d2e3bf6c3a64341. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZNWT2129394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f020090303b8764527165b2c28521ff4050366cfe6d464ab5dc9fe09193296. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZNWY2137621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68c2d1b1a4ca8f8ebfe9f42ad2a94818690067147834da8cda04ae2e17158f2. 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/QZFYY2241571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5afd4b040fc7262b45252cd6cd2650f9f409588210b285383d8a11ddef060fc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZFZ62276956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb8b2d7e1971b4975bdd823a41a5ac267f72eb16218c4c1ddd3c55ece72c352. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN82228397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a1005f501a918ad4897943ad6cafedbe7785ecf82c95a0315d318830cdb6bf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZMEM2258263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee740493a899b6ff603e4c3a808a25785a4fa1832f9ee5a65d7d199c3526640b. 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/QZTAW2203632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3354923645f563a502fea72bd39df711a3d21ac4d273e1e495d3cc8cfb263b3b. 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/QZFZ72365259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43020032d0cfe51a29702755b488d947308cc2430297e8c5de20910e121ad2d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ72365260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eae4eb773f79bc9eee14dc4f7f63f2dca0aa635d30697961e700bc4f682a86a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ72365261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b3a150d231dc86f67b491da5598cbb8c09777394cf252286352310effc6599. 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/QZK6G2367452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7122224d4e0b454ea7f80df3057da9afd3ebd972d612ec8f91ce9a38266d9263. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTAS2362618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7598c6ff0e7d3f8c0b11e33eff031a5ecddbaa51f672f40313388c095839f7b3. 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/QZTB72312767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b5aee74397dfd740e6f9784b0a056d0ca3ac5cf96d2360d90b132890ce659a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN72467645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31505c712eec98ee6c71edd969bcb5054c007715098e8694a724b3b3cb20748. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHN82427547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2e7e19a01ea360559e38841ae43525ed949f2860f3ae1d3e371d2475e0ba54. 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/QZWFL2308123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d5269691210af4f50c0448daf1287ef1b1a63510419f850b28084c606e5599. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN82427550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3246ab7f01007071d38c932f5729c59bfbecdee2132334c0b6232a30d4983b3e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZHN82427551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc196aef586c59ff06cae65e4ac044634c0444acc6963248e757439f28a1a09. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/QZHN82427552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5472cb354d3e454ab40927eb4409973a07ceced0791e9356cb35cc140924187e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZHN82427553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62efc4c925f8337ec4fb05104affaa84a5f13fde21daa1552c8e007597647233. 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/QZTBD2405863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34449e60ca05c6b96ce84034cccbe72c110cd19559fe6a07faeb585fb15ace28. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3EX2460005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17205fd316d9b987f3b3deaede5b0dc5e85a2c6f60ef6cb1b5d31b7f5468cc69. 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/QZDA52570407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df8d67afbc808e6c08826df1fe3a48f73f5f1ce11df2fe5f4c4a5bf5c9af08. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPLS2432078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ee741f2ef1e2d2e8f57425ef48ac70c3c61b4d6409bb4479065dd3ecd72ff. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZZ7X2548938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc947693390f9821a37f67d1ef5a9d464f4224800eed4c76c5954542fef603aca. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT3EX2536058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e47cd7294c80f754aa7abed5237123a14baaae602cfea60fbc6a739fed704f. 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/QT3EX2536059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3216fe2c8b4b7c1b587aab13e25a469f531fd5026661555111960449f959af49. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZZ792531508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4116276d46bd486f0d773ae002009ed0822f6e7994d9a8fc3bb5553eb16ae54. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3EX2536060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35df8d67afbc808e6c08826df1fe3a48f73f5f1ce11df2fe5f4c4a5bf5c9af08. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPLS2432078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9fac87f0666530470a5082c9e2c14d5f79f87b2eb809554e55490a27d60cad. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT3EX2536061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a077c5857e0b5121d64b5419c2b3423a19ba8bebe38a6a303396d250c5b573. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT3EX2536062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6138c27fec2e9bb30aadb9ba0af2429d2a960aec8de98a68cb9522b63e929c. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QT3EX2536063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788a815832c7ad38c44be27afd459f139675a79668d728575a586139ba71e09b. 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/QZZ7N2585259.