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 0xc1cbe809f8130a5da6e21b7872bb19c00841e8d5fb633b73e9131c8bc7ff8276. 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/38fa4b69-2e17-4b09-ad0a-9bf254ac435a.json and https://artists.proofprofile.net/proofs/artist/38fa4b69-2e17-4b09-ad0a-9bf254ac435a.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 0xc9cfa4394312a54d55977c3ca99404d16b0151ed709514cab82c255feec3cf4d. 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/QZPEW2511255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac7cab3278949057ff92fd85c1e01412e5fd1edbf7a5c5c6f5a1c0d61de24a0. 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/QZPEW2511257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1e1c41bf68b7a9b27091bc88bddfc69f60b6b33f9c9424282ad0fe7dfcb32b. 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/QZPEW2511243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1afab09ea1f3233f1bb70efb7a438df91638dcc4eb26643da8bf90cfe495c3b. 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/QZPEW2511244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf422c2113270545e5f399f7153bee032c0fc7c82e486752c4700b014fac9ecb. 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/QZPEW2511245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888e58aeff313b17927f9433fd63a6b73adf21c80b94c750196d51c0b8ddbfd2. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZPEW2511246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd78151ead78dce84106feb6e1b1988be948d7f013fba69cedc6f082a5eb25. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZPEW2511247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b4b7503303678ef9000e4f33b2826c0dcb6ac72fb84b3dd084bb23703fc6e. 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/QZPEW2511248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a86a75ebc760120f634b9cd392a19d7cbf8c504dcc8be5c31e7517fbfea32f. 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/QZPEW2511250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c17b15476fae86332865290fbb16355af039398d4ddfada131c97227e68e63c. 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/QZPEW2511252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33138ff8fc5403f196e7bcce5cd127c7ad2cded6667679955c6d2e739a79da11. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZPEW2511240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cf9cbfeaba6f983856dc596a8413058c4f0e7c1e0144e535867817cda77884. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPEW2511241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447663362455f5a92e94ed1d81ca5ddfe662e1f0802b8b26cc250cfb21513f40. 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/QZPEW2511242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec681af06af312ee059fba95fd4076fce6f681410d1cdfa09e2265b3d40d2aa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZPEW2512479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad264ea9099975d0d4c0df9c7f2d6aad909f0d85c534e8a8cb00ee9f3b17eab8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZPEW2512477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff0660afc3681594b5d2287140f71062ff8367efe00a237da15bc45d0e923c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZPEW2512478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476183abacd3e7cb5fcb0a2f5c540f04f5af77648c459d7726bdeeb2b497df8b. 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/QZPEW2512476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c0a9077ce51575ffc5f2ec270e35bfa89f00fe918300ff5f0c25725e2c28fc. 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/QZPEW2512480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3117961d7a7e68dcd6d5b3825811b0b2cd592f81acde05374dc899577d07e25. 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/QZPEW2512481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9ca92a19b9716180a8a1404a7c69b13eb97551a006ec2f1676fda502d236b2. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPEW2511234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d561fdc285dd831277fd5bdef1619240b53a9beeb18752b7c48db3c80a594c. 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/QZPEW2511239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232dd7179191cb519768d4a40ff9f3af74f313bd41b23b0ab6411d07c4ba37b3. 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/QZPEW2511228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f5d9cd54b5fa6d791bac973c89efbf2dfbf4bb8bb9b699cce5529d95326bb4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZPEW2511229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc972ab185b6614c133d94ce2727bdb8e170ef1f128d53a4d07adeb9b9a5bc84f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZPEW2511231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6686291602c63c8861686effab1146456b31b008cb1ed0976be6025b6ddb37. 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/QZPEW2511232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc122425c47d2a9c89fa419ea493839912ca4ac4022d4056d96d9b16677219bd6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPEW2511233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511c2e2635303efe694756fcde6fa1ef18ae6e2750e0a0899c2fab2d85d97f5. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZPEW2511236.