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 0x423e7c4e850f42a59372060886e464611886e3e2ed5a02859db2ec8221296c51. 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/98731479-79ec-423c-a2db-830d1882deaa.json and https://artists.proofprofile.net/proofs/artist/98731479-79ec-423c-a2db-830d1882deaa.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 0xf1ca7225ba1fc0cf3d12182a7e1e6a4958a7adb78b14209cb393978823ce040a. 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/USCGH2124335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c97e3ea597178cc3ad31b489f0a82380d6588c8cd12860406e29be89584c539. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USCGH2115519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5776e3c5059a75c15d00964e39d9b236f52afd604e5d2e1a67ca865ec3b20a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZFZ42204991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5df22e168b08948c51ec317fcd04decc778c0ab40a89842ca7c87e2f9199b82. 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/QZPLS2363842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4b5cbf7a10f36433e39cf545fd389aead62947834077f2340b277141c3bf9e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZPLS2362683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ce8d462cfdee4e2bb7d4fa3f63a77a94b66895a2ae244f88d61e958554d326. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USMH92379570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd495859157dc27ab44518109b042f4ea006827037671b8dae84705d75c8d86. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:20Z), 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/USMH92379675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b090bcbf0244d775450f00644d82b79b4845d54e3625ba1a511be456ce08ed. 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/USMH92379667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ca3e29815bf58238b6aae632db779356070bf7cc2e94dfba9f47408402e38d. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:48:08Z), 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/USMH92379587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf1f810b0c5a307d600e806539ff2c80ea470fd4146f63565a6fa808499c506. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USMH92379869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baa56bee14f17194e1a8b4f10563e6fc98db3bab09cc7fc5815117c6e0fa9b9. 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/USMH92379639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1d0666bad63b8f55969a93503c7dbfe720d62f9e8cbc73e3f532bfbcbf8758. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2386703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eb4c2d0b65f76e7c469cd7d48ea65d6cbf7f7b33e4a2d8f49fa8f8c0d13776. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2387991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4487b010a67dcdab7fba40d2145fe5a8dcb1092b125eb3b721dbb7a3fcefb2e9. 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/USL4Q2328894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58602aa0b833641fad2e4bc80e210cf4931df4ff3989b5d520a8d2955e047c82. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USL4Q2362589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde144fa1f0b84729adac1708ea2eb3b057cbefc3c1e0dca7210c84a6e88a1bbf. 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/USL4R2316821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8297aa5941b63d1097290ba85f4f16f547ff93d4b9893865bb5bc067b89e1410. 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/USL4R2317952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a688ce5a9c6d77c5681028d0bfd6525594336edf43b725ebe9c6cdee683147. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4R2354672.