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 0x4eb2158bfadbe5d6ef09049ff74c910f544a579cdd10cf6edf89b6b215b72749. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7e9ea54-2012-4ee2-99ee-30d63ab57cee.json and https://artists.proofprofile.net/proofs/artist/a7e9ea54-2012-4ee2-99ee-30d63ab57cee.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 0x89c44c244bfff336d42c6f65249c2ffc1b040caed598be7c2838674a1c2b5777. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FIDUC2000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e52ac28b2d5cdafcf9c708a5da79150163defc4cbe953fd80eed499fc67193. 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/FILLO2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadff8e6ce0fc294807bd5465f7e69bbe6bb84ea674e9ad0f599b5bb17e7e3e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FILLO2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aeafc2f9744c6a901cc3a08e8e49d3214645cc44c38aea2d8b794f984df0b7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FILLO2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e52ac28b2d5cdafcf9c708a5da79150163defc4cbe953fd80eed499fc67193. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FILLO2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c3890ee5d73d2d197e9675f8b382a49b464bb7a95df582a40f1602cc36bcf4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FILLO2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3e36c1b3df3d9dd350f5f23f20a9b7c2fa206db8936f7ae20ff87c7dda62a7. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/FILLO2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77036e1c3572f3b1810a5f05b7d86b18063c7b45619db96519d3f87d87c3c5b8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:01:15Z), 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/QM4TW2380735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efdd49de2bba0f639f4bbfa029e8af523372c79fb5d6985a165e40753708f85. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMFME2227694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab6900c19f9855f7fd76862fe0ccfbe351bfb6fdf417f11f6d200aead729b93. 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/FIHYZ2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d2bcc57f1960805d51fb62b32d37a36c995bda96203edb26a6c65bdb95229. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FIHYZ2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842b6a344189ac9aa84bd881092e1299beeb516fb418d340b3a05cafa9223878. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FIHYZ2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26d2c950e75c5e1d05c10a9c54422b129ac861d6665900821aac7922241a2ff. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FIHYZ2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc52ece6d5428a7a70ce99eaf4028a025d75eb73442850c56a4b5bc426afd25. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ792562777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae821e578f0e57e10155b5178ecb7cecd91c2350dbf139549aa4a5e3243effa9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIWMA2400326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe211b7d5e69ead7bd808c18d65c87c3c39c8d8020515fb1a96a3e753bd62097. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FIWMA2400218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c277fa80bd0c9b8811523c8f87c6444421bcf25984bfaccdac153f0006948. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62238409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297ebe41d497e7b725d359d876887a255f3c202577881c3fc11d9bcbd3c3a0a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2260580.