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 0xf3b0c149f677cbaebb5d461482b2d1844f30ccff0dbc1d4ccd7f78ea07087fc4. 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/78fb8649-449f-4523-a6cb-18ec6cc8ecbe.json and https://artists.proofprofile.net/proofs/artist/78fb8649-449f-4523-a6cb-18ec6cc8ecbe.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 0xc236524a0f48d64ec475e701cc375755ce5e0e4ad3e6ee8560187aa57dd4dff6. 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/UK9MG2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9aa73a083d0c704d9ebe078692b3976c8e5f081c28c8a6f4c91306999a9154. 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/UK9MG2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e709630e5fc59865c308376c34c50bbfaaf5a799baf2ea048987f4b6d6550e2. 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/UK9MG2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bfc59fbd6ac96cef8382ed6a112a91fb08dd5e6db53d4f91e679ee63b90de0. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/UK9MG2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a58cf4ba684e662e59667b4123eb60ba36fdbad4b415d3671ce166c9f5f6fd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UK9MG2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade9611cdd67c9dfd3573d7ae78a63a78dcd24adb5005e3064fc2db1e1a7a50. 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/UK9MG2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ac66d73e18c2619539cae88d1bd832a6861c96e5c3966001e05086cdf06a1. 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/UK9MG2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e6d28731354e2fec3377811eacee9a25a2dda95a1ae82c5ef6098eb658e18. 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/UK9MG2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f17e39133caa618fc3f782dbf0ae31cb79e96a9bf908f3d74089d270d9b3e73. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/UK9MG2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b485de3b51f7c93c4c679bc2d13b81b81b86a07de359753787bcf4b768360b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/UK9MG2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1873982bb0385472be6fda0bf41ace9876ffacbf813acb03a4284cc510bf68. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UK9MG2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910863821c12e7d5610daa4afc3346e4ff9f05855021a89b130a4880e040d11. 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/UK9MG2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23711298478aa293be139a569bd60330b2e62e9a95a830f6b8c927ea4d612bf. 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/GB9MG1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816a002d38666a9661ff6a4c657396316ed2ac3e68ea5addc6521a152864726e. 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/QZ4JJ1799592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc17cec468c388391b39fbaf9c76600cdd696a8e684da4bbc9f428bfd9ef4aba. 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/QZ4JJ1799593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3922eb57369948213bf80b9f4933cb4f7ac522410d8c2c6989e19810d407a8. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZ4JJ1799594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2164f4823ccdad0f469537601b3b0c55886ae879e8c558dbb2ed966b686ff65. 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/QZ4JJ1799595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4220806abbd950263e1495031f244fcd056f35e40882d28752ea62de94b0f7. 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/QZ4JJ1799596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9755453d30e13fbc2fad2e13d6fa1b78b8126c3fdd108e5aa3b75d44a232ac38. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZ4JJ1799597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f5d604af5a7c18771d4bcde773bb3321a92578f05a67901347bffb85ff9717. 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/QZ4JJ1799598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dffe88f2639a9a0dbd97a3d8ebb60a98d7c2961db8345a24205797689d13b00. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZ4JJ1799599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ede90d1d1633125d5d64d2a0f5a89cb5f1d8c3378510fba01b8e55f4e85b07. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZ4JJ1799600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572bbdd325f6cf54941c460de8bafc2c501a5c5ae1c85e63b7a4aab5012fe696. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZ4JJ1799601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170de394c7ced51c6b9e8987e52dfcadeec82c3d8977c68ecd50b1606728b297. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZES82112925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170de394c7ced51c6b9e8987e52dfcadeec82c3d8977c68ecd50b1606728b297. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZES82112925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6615aaefdf8813e6860a90843d0052921f3930d3ea4053e13b52d869c03a6df. 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/QZES82112921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8043b7fcf679a4c7dc069998ed983974ae0d8d347678c11a962daa928de887e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZES82112910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23066db6ebc73146807a56f14c0544ac2f2371c45dd64d424be7bd4290057168. 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/QZES82112898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16bde66dc0edd251fffb8c10f9f72fd142271dfdec6c615497cfd4c80c298c. 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/QZES72158205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65429a4f2557bff36ec7dd170c1a8c2037a06e02d10620227bd95d551200154c. 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/QZNWQ2077187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6b334d2b4bed8e204eaeea9e3e816f7ed56c45a47db804dacf2f4655ecfd2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN52072630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e709630e5fc59865c308376c34c50bbfaaf5a799baf2ea048987f4b6d6550e2. 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/UK9MG2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc5ea2050b2d204a3dce49824faebafad5be5d9819960e672e795d38cb1d01. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/QZFYY2056708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9440945e57f7a7016e593f828afcb5e9c0098a095719a47ad1f86bd9ecd81998. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZBRF1844112.