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 0x0d1d4982cab1ab48b6c392e8739af4bcddd12db8737d181efb9dc01687b1cbab. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c376775-8073-4037-a9fd-39d47aa44e20.json and https://artists.proofprofile.net/proofs/artist/6c376775-8073-4037-a9fd-39d47aa44e20.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 0x7cadb47c025293bb697f2665e2c58aeb2e3591b2146693b8416c66d4575668ad. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTAY2483431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77d91dce52c6a499997b86e0fc0625a83ee2e1f8a4140db62cf2a4b68d379f3. 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/QZTAY2483434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095de9ba0a2e986becc566e6657f687c6466fe2abd07eaefb70f84ec7ced3fb2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAY2483435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b13f6d486e4487078ed3b4dbb60c806d10b293395bcc7b6f4881c04acae6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAY2483438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ada4f60185a9f5adc83d952d2b57731c7cf01697a118bcb41bd762ce0426ce. 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/QZTAY2483440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93edd0eac3470f2ed82ac1b9026e6de60a1c4ce48d137bd1f48f1518aadd3181. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN62538947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc778bcc7dafa4bccc4eb3ed3a0e000b181ceb75d8dde2649e1071866d1b503f9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:20:06Z), 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/QZHN62538948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f6715635120bbe7fccf1932bb61657b52daa1538de7b4997912bda3f516c9f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN62538949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86df06d01694d64b20ddf317e02836df4bbdc388d543e6035ccadf82554982e1. 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/QZHN62538950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab2fca81c36613994aeab450003579d10d8274ffc87772e2ccccab198cd5209. 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/QZHN62538951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9926f10698fa0ab76d25b6b3ca1f1197017865ce81ea5a3e18a0b7ac51fcaa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB62418734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7937e60b381ca6af97d30f2514fb09c2e32ab921231b31a06013de51ba8864. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB62422773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3a81ba49ce1698a230ee5e4eed9dfe6e529739e7be37556af8cfffa0886082. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:05:41Z), 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/QZTB62422776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe4577b181039224d0b8705b5ee47409da899f99499d828337be40c4e1f2f57. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:45Z), 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/QZTB62422779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3db95f8739bacc1aeae1b6b9330d6fb02d2cda7b4189b82a5845b106ed4773d. 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/QZTB62422823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2b53feac7ca9403299c3de005540b4a5a1d12d2f4491cc2fde42f69f5c144b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7L2484448.