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 0xf3567202e1148fd894afa1e4030015985502213715ea66c2b7fab6cfa98b71da. 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/dda26def-ff35-464d-9fb9-4b4b8da60b66.json and https://artists.proofprofile.net/proofs/artist/dda26def-ff35-464d-9fb9-4b4b8da60b66.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 0xba6183e3703ae8996e385faaf99747b8a8e2575480346e91c630cc6e719e4ef2. 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/QZTAY2377030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae5617234455dbce0f02ba8751de13e8d85d8807808c0ece905f5ed6894ab9e. 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/QZTB92353086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa59b8536ed2c16181ebc86badaba2dbd228afd3366bb30c215dc5ab343b850. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBA2304824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad8d0337c3e4da53227aae4ffa98e00638b23bb747c48d1cdce5999299bf7fb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBA2304819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17663074c99a21c5ede17d224cd61f111bbc44321a83467fdab4eaabdd8476d2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBA2304186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a997e0b441650a1f47bc945297c3a6c433bafc497c9231a5d7f059dc604d7f1. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZTBA2304820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9591f7617730af3cd5f6d7bcaa571633621fa6d3af65f272a4570ff1779cf1de. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZTBA2304822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1e648ca92aa71494a9e943143edcf396575eb82156bee9e573bedbc4e9338f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZTBA2304825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a075838159e3ef130c42a2274f18c72a3679a5d7ff7f2c06bacbc40a7d3758. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFH2361026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401afd86aeb03d13e0c57bc7114da61efb328a1bb564b7ead413cfa8c5b86d53. 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/QZWFN2382532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cbfc7dd2fc453666e11960a75688901f3ec708b4c4745bb654563466ffecfa. 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/QZHN52488655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3b8d7664f6e749247d07f69276be5b93c294831ee812d34366c8f557ab668. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N2412572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdc81e2f3245997bf1b5c8d9892714033927161de750de1f624b48c83465f8d. 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/QZK6G2494278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376f8b31c4a46997524487566dc575010f87a6f9471f4621d58818c8fdc11aae. 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/QZK6G2494528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d470878536dbfbcdaa60dea58e39a6a086f92941c37a6b9c2f066758a1ccfb. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZK6G2492852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf64c8bccc1b566870a678d2619f60b2fd2827e68835d461f91f5d4fd9fa0776. 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/QZK6G2493703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf494764c8cabda4629fe5123c7fd08a3319d9a1c9ce4ae2f94cd6a4efdfb5720. 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/QZK6G2493071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaecfbdcfb117dbb9df85a6415e526c3bdfd1f04b0ce638259f18aa57a079bf. 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/QZK6G2495183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295c22ca6fa629664a1876c14f900c8be49ad85cac47b26c944962972183887c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEM2496572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c0cbcca6d9e42e0ab451f2bcc37287c814be4b4361aad471c4354f4e1b8c26. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZMEM2496573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5900cfc69567f02e5e3fa555ee4f9b34fcf0d6475e8819d01407e143170a122d. 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/QZMEM2496571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836f6976d658d50260f641dc994172d64c25bbe69f4cc2003cff41e43346cf71. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEP2406067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1654e16c49eb52076db4816e3db98b62bf57154ad04402fb09f3bec9a98879. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZTB92491448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddeb776789d164e3b4f0e3b5ce667440bb91e0e567fcf7ca05ffcbb05dcea1b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFZ22565671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc342fe52df5da906b31be5e452c2b8a0ad09aa6727fb6dfdbdad35178bb494e. 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/QZHN42597381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662653aa3c9c2eca1ba69ca38d93a7b4d302666238e2c1d680c5b296d48d68dc. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZTB42541325.