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 0xf0df5456dc777c7fdf47e1662cf9154b3ec07ca02e076e4969bfdde164d78f74. 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/0305a520-773c-4cd2-8f43-82a03bc011f6.json and https://artists.proofprofile.net/proofs/artist/0305a520-773c-4cd2-8f43-82a03bc011f6.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 0xf85612b4013a83714e8186d8d3df49ec44e8e3de02010ac0a9b27ebd6208ad0b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:32:19Z), 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/GXF9Q2527979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ca578b8291169bf530501188a6e8fd087964c4c9bff289e999d723ce00917d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXF9Q2527980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc11bb155b0812f329a12c970a1ef64fa29914a226d32dbeff5fdb427b44dcfa. 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/GXF9Q2527981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac76fe0b84a3ea42ee4c6bd08428d62442a8623dd40c561bc77086cfddb016. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:08:06Z), 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/GXF9Q2527982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9108ade38a4df3eb3f0641a3ebda69103f9c8a293a370c0840d9ff7c472f7f. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/GXF9Q2527983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcaf69d175f50f9450ecefa1eeee7df061f5b8e0b7769d43b600b3f3ef432fc. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GXF9Q2527984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16cda19a38da20b117bcf76652df6fd6be42994dee68ef34cb2dc8d89cd796c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/GXF9Q2527986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dcdbdc4e0798730953b61ad32bce6a5f95bc1bb0ac77a598c14d3f1a23b2ff. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GXF9Q2527987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b934e5d089b8e4355bbb1c905a1e807ac8aa7587afa6260daf4e269e3cc11b9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GXF9Q2527988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cafb37a40ce1538ef18478ba7b7660c22069f7d56133a3ec46b776566544ad. 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/GXF9Q2544364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e2a65977e7e8bded4014e5b30df19493dbe8bebf324271fc0aef882b55f0f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GXF9Q2544365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70eed2898a722a110c79eb2ced1719a122d558937609f44d2f984ae5d692bf24. 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/GXF9Q2544366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647f23ded6f6c5dc60e938922a16ee45cf9accd6592d0e5725333e52cfc72094. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GXF9Q2544367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f2b8ad7792cfe64518b31fd46d1299e5009eeb88bbb1bbdf55a9199a9e34fd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:04:04Z), 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/GXF9Q2544368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a1b11307f3545faaae3d0ba31d27868c5647fad82bc495ae6725d5a65d37e2. 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/GXF9Q2544369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4044e412c2907038d8e13f0c2840609fd9832e94fa6b08a3659ed40497a5ebc7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXF9Q2544371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd80f56bfc8caea19c9814efe5efb6d9014b386fbdd467ba3b852cf6f784765. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GXF9Q2544372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcc1bb9ec7003eae6f4c228f593d8eba866a0b61d2f608e533a8062a99c55e8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/GXF9Q2544373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cbdf6e8c1b201ff6dbcfbaeff81bd5e4c68fee632b1932167ce662c5139c4c. 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/UKXN22544089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a82ddcd2a22438024f73f626767fad9007dd3501202fb9af6509871eb95e4f0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/UKXN22544090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011fd1f0025080730b96723f117637f9d4caea7eecb790ae3abbfd70229d73f2. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/UKXN22544091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e6d9b497a42ffa84a1c430f0944817cc01e672029f475fe21b2b437cc53303. 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/UKXN22544092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e1025c725bb031165b6dbf76f67572de4fd5984d04817e853faeae0da249b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKXN22544094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16be81ec0efb6e123f4f12e592536c21ea4ea9e934e8d0d546b569d139c318e0. 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/UKXN22544095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35a64ca90a085ecc6b4e80525e10d22f3e1c4e78622e3b166b054fddbf1447d. 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/UKXN22544096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c5827015960e3e9861bc8a2ac5d6810de5341534f0c45f2f34023772400d76. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/UKXN22544097.