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 0x2b9b92ffd40733fc4fc7e7614ee98b7d97197f375a5d1d2d019d8cf19f849c39. 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/83ec8f0b-07c8-4ef5-80a7-47aeb2eacff9.json and https://artists.proofprofile.net/proofs/artist/83ec8f0b-07c8-4ef5-80a7-47aeb2eacff9.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 0x3aae5ae70240ef1aa7659faf388fdb1f17336b29393f8ad2020ac032d7a874a3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762426221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66120e11640f71f33d2b0f5ff1a54215d3dd0bea1eef8ba03fba1496a3691e6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX452492040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f60f056315d103d11b71e130cd089d3ed0be47e43c0498def49a5d8e1723c. 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/FRX282408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3148f8e7a040398023f10fda23593ebf471b3b0d9f3d20c79c422f998c248e51. 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/QZHNB2451653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f17e7dc9bc56f0d02f2b712694d01dcb4c2df0b6e3e309cfb6559392944f73. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R2492929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca25fff31b4b5243688336444cc3826c96264fcb3d72dcb0fa46b7f7a841f6f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R2427342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8f34d784369bdf9a73d5a248a80d840bc309a1693a3afea3258084aad9b8da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R2419598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b993407279cdb5735e4be01b88ed2daa8a7daae0f4e6abd35c647c6504de5af. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0Q2365317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefd06675534024e9bd14473849956d5432284b17a3488d65c517984f12d9f00. 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/TCAHR2366288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe72af1e9897d0783d66d6378a39c2906271ec26a8c1d2abcd377bb211a80d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA0M2370245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43821060f753d16ce2f3444c3a1808bbcb4ec1e18fe1c2fa682048e28aacb316. 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/DGA0M2324642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf364e539109b1c985bde6cc0b29c5f3c19497ee5656129adfeb3fced1635ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092376812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450de1e48ed1bb34b4ab8ba8772adb23e57e4347603de1fea2af4aef7b9a1129. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762384017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae478b30d4c9cd1330955de49de26a5fe85908cd1aec431d0e45cfb383d6b88. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA052310087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44a38c83ec662314cfc1c70d9ffbd318574d8d6481523442a9b304ce82eebdf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762374286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c5c70abb53c7d856ebe0ada692804e0b2bd662202da9beb457576ab5003cd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2308773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9048ab48ac23c22ffca35797ab55c092ebbcfd0d961092339fc57e17a48facbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA082299440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07622d0227cd4eddfa93c29043d188c426cddd26ea59c5fbbab91ea80bb0985a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA082299441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1713370bb0d2ba82002ff77804ea1bbb8a10cd0e1d7e80f488338814a710f4c. 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/DGA082299442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb24af6f5ac5161cc5e026d8e477d5758e0d6e15e80ed393540f686946751ba0. 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/DGA082299443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd927df67dbd63ce32081f3c418f3f4c1b196a1773b0ce3f292f7d4c2a973944c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062247509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec343c1fab846bbfadbd28f3e2cd660dea2aeb1b71d675dbfe285b81dfca3ded. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062247521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348a097338f67830eda5330e2753c64bd46947dd5c8f81d5b686b657cbe0dffe. 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/DGA052293065.