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 0x4000ae05e14f00444251be58f13dcacf86a0874331f6f2056c50b3af77714d3b. 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/74db4248-aa57-4f09-bbfe-2207ad3d2d89.json and https://artists.proofprofile.net/proofs/artist/74db4248-aa57-4f09-bbfe-2207ad3d2d89.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 0x80fa6bd2ed9208d6ebe8006ecf98c7e65a3b839ee7d4a00a9eeb9fbea1428eec. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USTC40835954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fc99a6879e08248a6620b2f628485dd09e741d53ef4a479bf397a180ddcdb6. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USTC40835958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75776b881ac2c50a4d9c8af8f9bf14c409dcdf043fb0695263b888be2d87d277. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USTC40835960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb3ef9c62a889e5072f99792c0145cc096f70d2f1ad76d264312399615b43c4. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USTC40835963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc49a1fd55bb5e8707590e5216ffd521e056e34d8a091881a3bb7bbe2abe2015. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USTC40835964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5bb61aa12314a3be7ff3e28e28e429aba0761edd7af91aaf478129e56681d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USTC40835973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90a512addc6d9d3b94345ade2239fcc2ce0ad0d2ff7852884c82c613acf02ab. 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/USTCB0978504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95cace83d06c833e4a51304ce45e98f4c040ed90d7aadee9059a6fdbdc9152c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USTCB0978506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79b4506f966992258af53b99468337740b09b61da744dde86ed267bba5d68d1. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USTCB0978507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916dc88fef2072440694aa5789b88bdf270ecb3af4e4e3c332b46eef675acd7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USTCB0978509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc598b09786cd25a885c2fde4872d6ea7eb8987a386f8201f0ed173bdccab4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USTCB0978516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12800147f04462bdace3b961ee8b567c16c7b0097895bf0f4b2fb1d907797c7. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USTCB0978518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9868845bcce54275a3c1b0408f58d73450ee47ccc3752fcb84c291650d8f23. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAAZ1176633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b3587f9e1f79f58f642b212020dedd800dbc5b6e0c619af25404e402c7504a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAAZ1176635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa689ed20e5ec2d0d15226d421329d16771be43b10935ed7c33bdd42fef6d8703. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/TCAAZ1176637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d59d792fcd1beb0329fba164b272aaec7018f97958d6e7e80bf98e246afa8d. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAFF2071853.
Giants - Live at Aiguille du Triolet, Mont-Blanc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78145335fb1d96617f2cbe33e064c0f972274b27d049997b10a577a0012e8f22. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR59R2231217.
Stratosfear - Guitar Launched into Space Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449681a41e9b3949f79236f1ab54d8fd8358479e1f4aed2ebb31f9d927f33450. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR59R2231221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7304beebd81644cefda982b8f7a7b6e2a357a3256fc67f3db84093dad43bc4d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR10S2305246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ebd146f314f93006586cc15d7ec337ed4b082beefaa6d72cb1d045be1d1213. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/FRX872473873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df40d868128ed16f67645bc99f72994db7a679c6ad9781e272deee297f2117. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0R2463896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36048f0be3a0a1fc9059e9fedcee044207b91ba751054dd12cd6df34fd99062e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA0R2463897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcce75feee49c5071f83764c6959f5dc786e2edc857bc8fa0c9b76ffa385d9cf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0R2463898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9d7b762a423d40c091523d3d91805a6555b8636bb4b2af97b942b984acaa1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA0R2463900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bd4c13b70069649860a824a82c9713a4e80323cd642be6e6f9784a0a9a5cab. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT65Y2510204.
Ascendant (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5477fce93fce8fbd8d154c6d07994d38db9a244a5a0197689e981f3aaa75ef03. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USCGJ2161982.