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 0xebb3a4ec8b2ef534decd71ac395a7cba56b24a006bc03764985982296a402d88. 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/e90292b8-f715-4a3f-8227-45943fb9b8b6.json and https://artists.proofprofile.net/proofs/artist/e90292b8-f715-4a3f-8227-45943fb9b8b6.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 0xe6e8331cbc6fab48eb65a3d902b016414627b5d9ae6e4508a67d2cc8cdf5033f. 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/QZTB22324821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015f3d01bb4a4afd528f198d887c18adc8efef7cd2e3901364e1018b9e007bea. 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/QZTB22324822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf603ba76aad2324c140eff6ebde6c3b37f2ec0ba50fd1d07c83bf01057386a7b. 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/QZTB22324823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb79113969735af4b32e7208e00655b6cbeae5b7e6e41f9b287869e05255b326. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTAY2333803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e58dfaff6e34c5c253922a19e62ab439154a932ec81f997e6bf93eae3a682eb. 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/QZTB22324824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced5b85008f0f40258d69c38d72e219ee1f678f91f8bf5b83764c760352e058b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZTAY2336353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9e875f71f7df58314f67a63dbdfc281e37e65f0a27b9b3af67aabfc0b45aa7. 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/QZTAY2336600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a837b90ccf78e1de5d561566d11fce60ecc1d16faabb736f3059b6ec2f21f1b. 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/QZTB22324825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9b6cbdca40000fad809aa1a42afa9ac6fc0b89ce3cb81156b2e7803baa2d0a. 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/QZTB22324826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a25ce990d55d79eebfc95a2e5507c7a030c187aa135243800abb8f6998c569. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTB22324827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cb3c5ac090636c856bac793ae4687e64b892885b8dbba5c5ec0ceb7e28ea82. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZTAY2336422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2097ae1c2ea8b6495adb44bbbf082e7fe5b5d81116a4b431087b9992ab2861a3. 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/QZTB22324828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6d6741ccee3b21354e3f82d5c25d60c0f6c2e783299f874dd1340099fac470. 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/QZTB22324829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70201bd1211451a90b258cf2458f5b6f1bbcf285909dc47d12b0101527d125. 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/QZTB22324830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0206520025143a7c0ba88530718b9c7b84ce7ed77adaa3917696562e482a14ac. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QZTB22324831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077fd3a5d8ee3cc2d57784d216de18abd5b0d88e5d10543f5360888318b6d3b8. 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/QZTB22324832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef7db14a075813148c0b5e535b229bd8cb2832619fb781465485a9da76ec12. 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/QZTB22324833.
EVERYONE LOVES A COMEBACK STORY: PLATINUM EDITION
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4afb2f7da5ecc654ecdffc291dc84caac7eb07ba72fc61e7f7f147570b1ed39. 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/USUM72306378.