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 0xf1ef8634f83e8b5ce3bf268922e72df65c656b1455d9a497f4d7007ac4d6b5f7. 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/da995da6-4d4d-4367-8c15-b8a6bce2b4fc.json and https://artists.proofprofile.net/proofs/artist/da995da6-4d4d-4367-8c15-b8a6bce2b4fc.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 0x2ef0942fbd07dc25996fde431706c7ef30f4c57cc00b1b9cd6cc0b93f9b3f13e. 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/QZK6J2527594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba4652c409384e934aeb8bd627b48981a04138ea6eaa205beb0ef3b175972c3. 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/QZK6G2558117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c9d4c875664139a2f5417bea9cbb7e27b51e3571e97effa4d86d959062fcab. 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/QZK6G2558118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ca8500acf7bcfc4dd9ba8f386306235c1912a0a367ca0d29b2971f1760be87. 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/QZK6G2558119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd245b9b169add52a94919fd69df98c615fee4a01abd058aeb565a59edeff80. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6G2558120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03828d9f16a8acf4e8cb42a56ce0a507a936f4aa3b55c1e68b27ef67d58f061e. 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/QZK6G2558121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0908f2b75f8ffe64ba8afd3f3d7b301ff9c52c14485ccbe519247c7443715b. 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/QZK6G2558122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c822fba4d3c98227d0de386ed2cdff6f17264b15bbab390212cda44091b7ed2. 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/QZK6G2558123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b12148ce59727ace5e9c270591aef169ecc78e92be0f30557c7908ef6682c2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6G2558124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d556fe85068d7fda385ddc83e1a3a364a2950602ef1857599ec89571d1736a. 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/QZK6G2558125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee66eb5c80f650f6f44924a3285bf8cda5917fa4c63746c92da1e72d48aed19. 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/QZK6G2558126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7998bca8b12c9e8300058fa42a69cfd8dbdd3e3d5d3492bacd76816b0878ea1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:36Z), 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/QZK6F2576822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb69ad2929d2f22b55582923d1d9e0f3dfcfd5b7e7e52741f13325904f32f1d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6F2576823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5c743d9af69fdea12678320f714a613df9b036790612e20dbfc87147e235af. 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/QZK6F2576824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b329b587078327a04f641f13d6e687e8671c318ecdf7bde1d2c654fb59f02. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6F2576825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22415e71c57ece3bffd4704057130fc2b619cda174d207007fbcaf87a8e8a05c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:58:59Z), 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/QZK6F2576826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d3a7e44e5684a4df71e848bd54754d6d8094ccd75574e63ff0ea128e28561. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6F2576827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ebd0ddfc38d96ef0218571a9e68abc731e3cdf32310c4a8ab8f20ce9e38655. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6F2576828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3cc399180f1dfaef08607f2c8b9215878078b9649fdf1b97b2ffb7e5087fea. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:29Z), 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/QZK6F2576829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1daf3e4d4ee4d505ae783f96119ac00aedd29d1c18e773baf1d31493b782ff. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:55:55Z), 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/QZK6F2576830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abc908bf0c4da36b39c47f5ea15df1f5d8b268d4b4e77fa4eb3571ba1dead8a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:49Z), 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/QZMEN2522007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7288ecd4fec8012288014a212bfbfc82b03dbde0b7206f3a69ea321f6aa35d. 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/QZMEN2522008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9002da16e202ea6f2a17226388f4d30f3a988bda2ef4ec0a33b228a305e64b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:51Z), 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/QZMEN2522009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee2a0b82f9da8b88d5697a22513443ffd136f8920f31449176684931f78704. 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/QZMEN2522010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0dd7f50f16cf599f001f779d0ad5f41e32d685919ba497478a44e23ae2bf04. 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/QZMEN2522011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c3285db61b72a5c8a7c19f4ff562db8ea9e828e755245e9d08215492820a1d. 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/QZMEN2522012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51ba417028b15c15abbb1e10a1c1b2089b337cae633b30d995621bc877d83bb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:21Z), 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/QZMEN2522013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef7de864bed1d6af2fa0c6c0b22366bb8828720bcac57fa8ed26271477cb918. 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/QZMEN2522014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa306cf9f6a9e88bab16b4bcccf530ce4459fe321b183209e9cb9f482b14ec120. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:29Z), 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/QZMEN2522015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cc0793ddc088a8e5bd5f7e8c5960863a43928612f49f049f432412f1edc3f7. 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/QZMEN2522016.