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 0xa80bdf5efab97683357306fa0fb80ee08735bdfdb49b28d6e361e6755ac0a32f. 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/cce4c7e7-693d-4ecc-8262-a79d0cf0b9b3.json and https://artists.proofprofile.net/proofs/artist/cce4c7e7-693d-4ecc-8262-a79d0cf0b9b3.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 0x481b33cc94fda187404b6fa622b75547470a753e4c76bebaad58929857a2b3a4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:33:23Z), 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/TCACJ1519919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524d116cfbe5c2a79ae83dc822dde4f6e351c39be52eb916302058110fd49129. 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/TCACT1603120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03485424d590a34df219103259a6d102c58f477f556747667b27389d273dad. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:28:28Z), 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/MXA411400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a00aac542b1a857778c16cf3be5f7cbfe00f9274c9d461bfa7b35f4ec00f11. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/MXA411400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a00aac542b1a857778c16cf3be5f7cbfe00f9274c9d461bfa7b35f4ec00f11. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/MXA411400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84923147c7a467c077c213c48abf9083cc411d5e0635dc526f8ed522d8d578. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXA411400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586e9b6b1725deca22a1a15e968601cb2358bc029d088cca41f9fa75531e03b2. 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/MXA411400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f55a4ae63827ffc12987f9dc94616e3dd68c3d8a7e38f1868ee65b74320c7b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXA411400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34af067572a9098d46de7c706230eef9eac3199651f702eec54d73de8fa2e42e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/MXA411400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acc1ecb5c0fb7449fa28b33643b2695659526bbf4436a22fc5ef2188f8fc39e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFN2151989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef13766201ca7723cfcdae6e50702b7d56f61eacb9ea40bae385ee8f1d44343. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAFN2152000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfce9ff8cf07b95535643eba147184388de86d0a19d179200b8d43b7fd22c228. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAFN2152020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eabc0ee894498401635c7a5b6e066c9c5e4ca344e5b18cc0f2dcdae3d988740. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MXA411400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f4f4aff3f12f85e0cf582110f8aabe59c08e1e35888921380f8f3bd5954f31. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:47:05Z), 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/MXA411400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ef8b9a44eb849bb4b428bca0a07e91558fe15c249cdb2c8e2f001c9f339da1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXA411400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba8588b0fb9cb506847e8c98c787536d92371bdf18e8f639b5e2c8e8eafe072. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXA411400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac419937412e3a2b52b79c4fe938a49268133cc1b8730a3010275143b306f4f1. 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/MXA411400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f37be08891fe10504115c5a215d99f9c978295b533e8cf65114d75de965127. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/MXA411400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0de0d013b86790aca3de281afa495b16e3212ce6e2c6a3b51e881b3dce4edb. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/MXA411400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5250e47ee232ec869575366996473e6c86f270ca95c021596608e34a47b7c6da. 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/MXA411400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f3bdc68ee991dc34ccc24ebfa533d6c1c9c0b3e4389b530064017ebfbb0478. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:50Z), 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/MXA411400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3717b4c145c4f362f08433483fd045a369a407e18409c21fc038341472d764. 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/MXA411400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe061ed73a911fb9eb5772adb97b348051c756fb477d28ef2c13d55092ef292de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDQH2266045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af667af877a508ba0d6817b6035903282e5851bb080d1ab3059f83955d26787. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDQH2371217.
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