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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ec05d8cdeb1bd9a553133255b6076db5e8c3994c8664cd5638cae9bbda028b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04324ada-b3b0-4a94-bda4-20190b868be9.json and https://artists.proofprofile.net/proofs/artist/04324ada-b3b0-4a94-bda4-20190b868be9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd362795c5e9b1155996dfa239c8ffb8189aca486fbaab99a3d4149d7fc7ba3b. 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/NLRD52316718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecc274e2b07125fa8ed0210bac8152e8a9c56583cb40c25e7b53949ec2488d. 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/ITKG02300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7cbf36027f51bcbb14886cdda81bbc25da5b89133be25328b6ea03c751d865. 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/GBKQU2361128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef1a836f33e62b4894d264f93a8d1ff17aad3061ad4236809514d0935df91f6. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBKQU2357912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c062dfa91b0862d20996ab3864a0aa2011fe7df7501615ab89836d3c87874f. 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/GBKQU2344010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2c347325ebbfb3432616dcb2dee7879620496707a7de01dee5979ef4181ce. 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/US83Z2313189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac0f418466cf803d634eb3609c32283de6269f7c387b7673c21a31d87865874. 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/GB8KE2302506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9701046f52d545ab653706861f82f0894a75a36d10e53a5162979e7f6c2d403a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBJX32128050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611176c69e539d50b4f4b287abce7d1e44039012e40a98a6947570a3807e2c64. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBJX32128051.
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 0x227ba9d950206b1fbedf093cd93adbbee70bb30d29fd53cb274508ee9cb78391. 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/GBKQU2290963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096ac589b40753fbafe77aa784f59d06af905548bd293dab83875fde4efcf2d1. 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/CA5KR2296935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd9746691a7fa52aaa3d2505f2195b1ccfa526f8895133e1ecaea3e4b2c8e5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2261885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebcd233ef02eb040fe43f74e1a278b0d5a4521d0b5833ec808709f9274b7bc9. 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/QMBZ92264996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a87b8b85a31bccf93b2783c83fee50b9959dd46fdd08184483b257c36f312. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBK6Y2107391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7079e07f0c4bc3b25db489f5a5d4f1d99b91cb4029be6553fc335f191906b0c. 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/NLZ542101168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439f962a8b099250147c6c9793e9fea5551ba8817534c3235a3e216cfea65ef7. 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/CA5KR2172766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb622471d275e03f5c4cad7269e200af00e30adc4c130b3effa48dd58c00ce061. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CA5KR2109946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3606c57663c4a6fe06ca09200a2e44f111cedafd3e0bfd96d166e75ea9b725. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2049556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9a6222c9476bc737258c80384a90c19108d847b5fe9f9125844db13ca4e2f. 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/USUS11900556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb8f76bf290dad79de24f08819324422f80fd434fdf23e70703f3d121a48c38. 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/GBJAJ1900886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa1a3c3ef7c508e33e718d9f3f214a2c0608e1d2ea24f175d1a29d2582cd77e. 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/GBJAJ1900887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9413d7d762a54588fccb725dc365bc4a10ff0db0d51cf108d019a01bab6391. 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/QMDA62479245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54836b6911fb149e8f3b7bfeeba5450b3e93775a7f33c395b5c0fdb007bb3935. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2491110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d120532bd1e706c17f46d52137b53d30b4979f57a3f085c307269b783adfec. 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/GBKQU2446544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dadd1b4b08106ce42c0488c1a05868782fa37d15823da8967d38276379338c. 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/GBJAJ2400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5697d6b6bb00fdd1134be0cf585363968c91179e0632149d8be39eb9b76fc. 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/GBJAJ2400700.