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 0xe339b29ef227365789a7d51ec530d8bd76f0239880f433d1b22803e7fadb2c5c. 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/23cec18e-54eb-4004-811f-b341b0e6e818.json and https://artists.proofprofile.net/proofs/artist/23cec18e-54eb-4004-811f-b341b0e6e818.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 0x4ffd5c3a74cc9169009687fd05b120fc5dbae84887dbf1291c6914b7d10f6179. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4DW1615726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bfe332d5f0c99bc7c439446de7f83c0b724e102631e78fd886cc319807816a. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QM4DW1615736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fac0065b34331c9a34cda9b4c8554f5dc01cf023ca22969a999798903051c90. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QM4DW1615858.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f26e83bc1b176fa063cb553be0507a833130df07b65ba2f82f6ccaf2e235af1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZ4JJ1719340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032c76bda8b268b386cb03bbd19eb40c5c237a33426debe5e26df5f5602865d2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZ4JJ1719344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614dafa9eade023dd676f24d6e035c3b3e934591a711be3f5498f69247a00b67. 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/QZ9Y21787849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff82d21cb3b3202cbc005892f0ff105ff48a8195274db854d360c58aa3b1ed83. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZES91996406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac1991ad5bb6ed2dcf32851f3ca30a75826905376615e112c9793e4f4f64d61. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZES91996409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efccff67327e859fabff52078402b9b349b20e982fa83ce463a971136035519. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZES91996411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a658777ef8df22da081f4abf33ea99b0c7df753e0727978228a3c9cf4da2e17. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZES91940326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd1785fd0a6be96ccac9362c9bb324a9968d1c089c87482a7018c059374b7d0. 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/QZES91940328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d35a7d38032dd30882ea35ae88e2a2787407641f24b44f2777897a635a8c0d1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES91940329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf6a2589204ea8a30a6615467eb872fb0db5da83046acc4dc4fe4b9d0195cc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZES91940334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fe099f1b57fdc5295a86d8ddc68bfe8a526f4524d2e62e77e09bb8f100fc8f. 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/QZFYW1900543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6775716f6da7c8d6d0ce05f4e4c21c21be9e620d78aa44dfba094dbd5698d5a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZFZ71969086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c58b5f28440e96954bb3ebd68e81d8502703fe65d20689e69b7b2d45c11452. 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/QZFZ71969089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219c6da4627fa6e5cec86746f1c45d775ea5cb3ae9493afb6f18552b0a1147f3. 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/QZFZ71969090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa887d98f52df89b952ea42501c7983cd944dbf4ece472ad8bf378171deb48706. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN71936760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197c1d899ff2f32c0dfe72dafa5deccb8908b069b74067881e69e100a8549d2f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZHN71974192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b3942f9134b0eb9cd4a7470e4362046d5cf2549f050b8af8e7dd1406bb1917. 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/QZHN71974196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e4f2618d9505812cf9179336148cd2425fb09abe0e61807644d69140522aca. 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/QZHNA1930743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f75a1af9102adabbc25f9109e53c927221e358bac11a0b96013a944bb6d43b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZK6Q1926066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf637c1369cdd49b44d33a16f1402a4b9e1609484bead3945eb7e7dcce462c0d4. 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/QZK6Q1954045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746227153ca362af665fceecb526e43ded12447d8e022221af3eeaa420ed3c8b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZK6P1985170.