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 0x0f451fba26c1d32ff97393c2ab4d1191439a3d68b2a907b8e8fa4d1cebd885df. 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/66498e08-ee8f-4654-a75e-4263d17c3c63.json and https://artists.proofprofile.net/proofs/artist/66498e08-ee8f-4654-a75e-4263d17c3c63.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 0x58413d101247687803880a9f11444ee69d2c022df3ea464ffd1bc09b4cb885f5. 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/QZGLM2333945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1efe9d8a7cbaed076cd1ab5e2951ce9e2c72075d44e441b46a02837476934. 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/QZGLM2333947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a1e24752944bb6275667ff7fc2d368c4578693255aaa69ab1b510137981834. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLM2333948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001c3821f6a9b23100f3d5f0c74f94817577facef268a9c4756a675615aa8772. 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/QZGLM2333953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb70037d13b19dfbc91c021f4caba964686d304732d780638c128a813483bd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLM2389047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb9ed8543699d0258422290e155fcb64f315ac37414b0372a9aa06643a55bb. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZGLM2389048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f972fbbaaef4de198ac52d79568e7740eebe72c86de0971df7eb6ffa534a7. 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/QZGLM2389049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4558b0e431390f98e5de8faa2898d6b3ec76b23fe938ca54af5b0dce12d6373a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:26:29Z), 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/QZGLM2389050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e23fd0782e6b7856d353ffd82ff64e8bbdab8e83d2d7d6b025d3a92cabbc003. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGLM2389051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ad6b793f350c4b6f35b96779750691129fca8a00cd4f6500a1ac572fe608b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLM2389052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4325016083b16cde85b3bcaccacabe83e48c0b55ee52e34385dd99eb64d66a1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:54:22Z), 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/QZGLM2389053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5002ff48422847d194637be8730c3e8c708703d31efb8024faa9a6f9fc0cd9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZGLM2389054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cec6e421b728f545c152e81f678159ca236ec2cf42fb313da2e9f37f5d8d7. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZGLM2389055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a374e0b884e7ae919d3498927b896f6f0a644490ec23b562b4d5db59cb93d4. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QZTPX2324482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5952d35b024294851512b38cd15834be30d5d2cef80f07331099f6f325eac9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTPX2324485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe319e4a8bd858b8b941082fd6f4409fb8c18a4f78002b4d74000e4a1682d0c7. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZTPX2324486.