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 0x12ac5cfa52d5f18276e00a2014beb59743cdf7ac22ca5693078cf8b7d3a303bb. 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/8136456d-fb7e-4e10-8146-db5c9aacde9d.json and https://artists.proofprofile.net/proofs/artist/8136456d-fb7e-4e10-8146-db5c9aacde9d.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 0xbec9d80874247716380b8ae90cccffb92f94e56c16ea4bd75e4d8be309992412. 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/QZTAY2507525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe410451dd72b702cbcf84b760a8ebcef667e87a24ab32a628b2cd9d8ddf91e4a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAY2507526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bae1c71447bdd9c03861e87eb0afa09088f9ae30f126ec1eb709aa1949637ed. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTAY2507527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e68e478d2ebecec53875f17e486a5a2f20979db5f51dd938fb4c8c3e6c49f4d. 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/QZTAY2507528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c443a76171933b7c3f992defd22d4f17bc4ee867af9133d2868b85ec88bab2c. 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/QZTAY2507529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5185b06bcbadf01c5fc5e0014f2080037ac41d17f2ecca5dcf41475d8e7f184. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAY2507530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc89f063a75a1e3d2652012755489ec8ec45786dd8b088790dfdc6b3c36efe. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAY2507531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560a61319b36e63c51003fbb5f7f35c8091caf3fc981e337f5e045f19718cd70. 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/QZTAY2507532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff0e0e9c4809a76575bd0cf5e55f2193560e1303b5c650b9f82781ff31c3bee. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAY2507533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab5033f1d7b7439e2640097ea9ae0a843da332a3645a004f67d4e9fa4069b39. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAY2507534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd389f052de5f28fa0562b58e51554a74bf61edf2bea8c3c3d2488e1e6a889d66. 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/QZTAY2507535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc309bf1cbb4932e57e64862bd927e958b109ecd2993a9d6a73ad4c7158545d41. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAY2507536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c348b1320ab867fbf2e82f4e3ee859650b8323394e1bd374138438850c93edf. 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/QZTAY2507537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd582c843dab5357cd66a86b189124a404b899c163193e008af2c98a46d4923. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTAY2507538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a306ac2b8082ab19b2f0c2bfe4812ef7ff242cca97c3423046e73e83d1805. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2507539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f77dae13d2b7431af5f35170f2f89647db0490e0c02aecfedd3d11e13b0ef6. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAY2507540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bcb66a662d5ac1399abb06e21efa7762d5b1319c8465349621128d26b812ea. 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/QZTAY2507541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356cc66b377f1523411164e34fc339c1fc97504d6339578a7e450149a6923ecc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTAY2507542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d67de325508047c229bc453c5758338f1e352c043afbc53117d53bb03d19bb. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAY2507543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd9336ba016d1a4122623a2affa0dede4cefd51fbee13c7bf6ef4785900afce. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAY2507544.