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 0x179075990379948f630d49e9d31f15d0795498ef3db94f4419984714f9e8aa5b. 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/62d8d927-fca0-45d8-9ad1-6e6f87751376.json and https://artists.proofprofile.net/proofs/artist/62d8d927-fca0-45d8-9ad1-6e6f87751376.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 0xbd20cc82ad21408c582380b55ab551375cbf447b981e4a1396ac4d52a1b4a400. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZYFZ2482333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3932d75de4fe98247bcd089b874d4365ca6c825a4e25b866490da82ea64d4ec. 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/QZPEW2528762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52709d2d1fbe7077b78e07323463b173d5c0018892bf7e29d10cb9a1eb956f22. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPEW2442694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce1e8844545b3b79b281c775345b9b4a94abd850ce6a60d6fafadca9a434479. 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/QZVEM1875048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2952b727120527af3510e0ef4f11ed1dc6c170905baf2158db9b3e35786561. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVEM1868807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d586f0ac1ee911dfcbe7c920c4c6206b43d757822768c0526f5c3ea3eeb630. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZVEM1805851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c1ca7e2f8b2773bccaed082941ba5b9281b4f71aeb82220295de4d63f8e770. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QT2VB2459073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25cd0a8067da0776b5ef75a001f94da278480c5308ab9e3760f2b2f49707637. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TLVEM2484870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5829b18b7e30e4e66471d4d24cb262a9486e8eef50726b7c70a84132755957ae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLVEM2474777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573c740de0d346c8d7fb11ba80816185def3fe506d5ad12ac2fb185154a3fea8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TLVEM2466755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c9038adf20241ff6d71972667380630a07790a6648e26b9876eb22e75e3ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TLVEM2461256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f35773bf2a8bdf90272497f0ce274f886d2c8bdcb7d48b87e24e6bc9b60055. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TLVEM2443364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d1e3118b66853067cc17ab8f45a5988bae80de016f70eba81ed39867bf5433. 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/UKXN22499292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435498772bbf4371aba03d64b19cdc418c07fb88a6cfc75324c42d068f0f02c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2436173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16799e8152fa9dd3c7d284be5c242c9a3c228a184f2360a12a5c4c7d408ac0f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPEW2496903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3075c9ba639a0f5921c7168122c8d082590566fb0272c59b1a01c15dd3355d57. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2468752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2c70b4683f549d5b7177655a627428914ed8670666933b011c994351197e48. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZS662478359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2ae0bd1d61abb135b9112009d79c2a4e06249847e9b48b8c53aa2e07e87515. 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/QZPEW2440695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50fc3ccda74ee9a658f5afa2d46b8279ddefc3594bc3708b6267d034e08761. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZPEW2440696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e18bb027bf8446248e4cb7708657554e16035fdcf9bd2afb542750fd51c76. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS642422588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4299fd1bd7a7aec6602db0ae9fa66a1b32f3593139a965f496ab678777b328. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPEW2441347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f50fc3ccda74ee9a658f5afa2d46b8279ddefc3594bc3708b6267d034e08761. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2440696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65f0de63b8fde0df37328cd57ab602c7a1b55648df59679ef38eca92ff43193. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB2485442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1006b6bdf834171408b3565ec2f43b632b690cd933936fea77ebe6bd10fbb57. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZPEW2448219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b75a6c96aa191be5d83ea313976424fd65e691a317849404dd20e421b719cb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZPEW2465289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b354f6eddcb77964496ea5c9faac0097935a877649dcf0c5ec13550ce62338. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5AB2400177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343dab6bca7fbcaa1a6551babceaee670fc359873d17ef12acc0c32d49c7fbc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNW72409497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edde0c9089d4198a96c91715b516705e032079f5a15b54b3f06066790258dc2. 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/QZWDW2443545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4988006f41a4760c83e077ae714c04ae82580b1b65f7f5ff1dc4428815db537d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZVEM1831783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bee870b9c5eb07888a3e4c6ec466e2fa96c15ca2c36e2627f0a3b609eebc51. 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/QZ5AB2423291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ec8d524e561e7593ca5c6ab5504d2b11a5282b206dca647fcb667bcb19f21. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZTVM2445317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c10783224ef3826a03a1ffdf184fd9465173ada1199710d6d7403f566a5e0. 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/QZ5AB2422393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0c1d41535f87761400df2a5dd6e7c502b953595aa4e73f2a4f5acf4718e41c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TLVEM2465592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07e6a4bfef0bb71ec7e898197c710f54af55aac63f00a5c72b2a8ff3716d5ad. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZN882417123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9bb1c3941f1ae4924b01cf30522ed268340df84bddbc39f9721d0a097384e9. 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/QZTPX2430192.