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 0x273de8c2c8f3fc13a2cfa4577db10b8a48e06f621bf6f3889819bfc5a2b0e911. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a1917ee-bd69-424f-b5e8-f5fa09b370db.json and https://artists.proofprofile.net/proofs/artist/3a1917ee-bd69-424f-b5e8-f5fa09b370db.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 0x78fef6ad2fd5dfc99de5534c716b9d01d861a85ce78abf0f64c52929d990a593. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:39:06Z), 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/QZWFR2470110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ff75f64d20c8d2f367eca311cd43b8cca4abc3ce54d34e95c9b13b882eae2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZWFR2470107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67185379f32f4e83d3d9d721d0926c629d967c754297796c378cbdbd5848290. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZWFR2470114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80e43143ec3484dc95386eff54125d4447739dab990afa2fddd0bc70fa689dd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:46:59Z), 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/QZWFS2468750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb849c0cb88b8cf84bd4db16c99ac483094af4742e320f86c795bc0d99673bb0d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:01Z), 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/QZWFS2469482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854ee7d6ffbe760e64f7fe2c4760643e9aea0648ec86072b4b707a24eadf5e6c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZWFS2469481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa8229caca6b7cd01f27b7cf328297be47fce85f7d7cfd5143b9f035266f07. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:41Z), 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/QZWFS2495160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05368250ffa21ef4c838147c456f0c5f679c1e970af805d26299af728505ea94. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:18:51Z), 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/QZWFS2494556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672a313441c3708830f33eb643dfbbce0080224d58f3535232545c185931a7f9. 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/QZWFS2495156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b93b7bfe9b5e15a501aa8a419662c2ac0fd4c80295c03210cbaca32aa188762. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZWFS2495158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a506bf42aa7bc9f86b0af7834cb2447704979b6f91d2acd47e6d7e1ca820a83. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:06Z), 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/QZWFT2495766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0824794ed9a80e25fc6c89eea87e0216a699b34df1666ede4c967c75bb0fee. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZWFT2495770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5ce69a3eb67626fcb3600e73b5fbed850a7146de90d98a35c4e5bf4df65f5. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZWFT2495010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcfa5d0c34a1e77ec54e24c149784435da083c35b56b5e9619453f921b93cc4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:17Z), 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/QZWFU2423179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a6ef1d283e2010b0f6c401a9074c0a7fb00b7006421edc310d62811383a386. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:46:25Z), 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/QZWFT2497688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ea2cbe7657847f2c15298ff05812f1a690c019af2e94f1b173c6c79e06e35f. 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/QZWFU2423119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6022906dc2fb1ca4e11625148dddb83cfa90b3c52a8d3b3518e223fd99d906d1. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:33Z), 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/QZWFT2497691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff563e4cc53a05a0f0a003ac48706ac4e47de140b6f1e3adc24a13e216b8a223. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZWFT2496957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba327591c26eeb3025e08d8cf3b9ecc23d2cf7d3afc0b091db51f4e6611f4c. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:08Z), 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/QZWFU2426460.