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 0xf61f9e51f2bad481138cec6afd07a8f6bc18511b2be741b89e16b40cea49d96c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22894788-05e0-4cac-b149-3b6756ba7a74.json and https://artists.proofprofile.net/proofs/artist/22894788-05e0-4cac-b149-3b6756ba7a74.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 0x6cbb5b1274891c9f20052578d7e3fcf0e292b8fa19dad2377c502ec1e36b721e. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZMER2531689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800bf14370730c88502f4a69e23957781c097d4d102301dcb0b5622f6d97523c. 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/QZMER2531690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cf24e397ed59f9b24cc599a78b73b7f6a418557373673a928ecd9e6f5fb804. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMER2531691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c41272f08d835b73415664cf6744615c4a0d0c1cdb83c9461f870c44253fd4e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:57Z), 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/QZMER2531692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018fff7b531dcb9adc1526850a75ee42560488eed4f3356a74f3f439552aafe4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMER2531693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1f669f4bc95eefa724270349130a31cc10bab94c8a5d3761cb4080b405847d. 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/QZMER2531694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e581a95fadf360c3d3435df1c0f63e3d286232ca625668a16b434a9e67e67ab. 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/QZMER2531695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a622de648a7f623ed9119fcc6d71c98056c06acfdd08fbe540c244076d809a3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMER2531696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3cd8358766374288a53bde7a9925bfc5e13e4722866bcb192b76fedbef2c63. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMER2531697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7fad81f9f94b01345219fbecf3efcdb2d55dc98ff415c898bf720c2469e4f0. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZMER2531698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430c212b0ea2966a07c256d06b9b4471cdedcc0ff027deb24de616c1dea4a377. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMER2531699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0e138d8a972e22039df96a1d86b20e47175e1dd69563563f3ae6085ffc0fbd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMEP2591526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf822748c3932901ea785731140306dea0e8fe5a2a9c3b6596a15e15afef03f19. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEP2591527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea87215e8f7898c0110486df387fddf5dfae03137ae5f354854fa230ad315331. 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/QZMEP2591528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c576253294ad2e53c1a6ec51ca7eed56b81b3f3375d098c20f85e372ae6d96. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEP2591529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0098f682c55815486588b59fb31367b4c9eaa792f5f5035b1f2bbe377d61468e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEP2591530.