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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a00a80e6020d8faf629a3424b5362f0b397c99ce997e6498ea937874a39e931. 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/6f5069a3-d28f-4544-abeb-31961b7cdf86.json and https://artists.proofprofile.net/proofs/artist/6f5069a3-d28f-4544-abeb-31961b7cdf86.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce17e52921f01c150242d21a3fc9436f3bffe59adb008dd157411800927595ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRIDO2012061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9561b9ec5f7c614924ec285744a322f8c78a4f3ca1d63dd0b2ff18dfaa41462. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRIDO2110075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4da1fa9b00f8f00372741f246f11092ab3b3c73104a4d9173c6b55f6739786. 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/GBLV62103648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb27519c8f8263cf9cf6db33fca6df2a2311599d663750d7892972621e3f225. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBLV62117429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb527b8215317678104b693bd65d25799659ec3a044a266adb2ce64a61cd72dce. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:51:40Z), 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/GBLV62103647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4535cde362004f738e0336ab60c2dae5525d01719603cedd4c9633ad8a183aa. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZ5FN2210152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fabe1fbc6f3dc31499a727f2adc77f1c428be5ee388e360f6902155e6a6706. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZWDD2388463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ecbc986837d04a9be07fef3bf10efe29fa87fdd92ebb1069ec86ed9c8e7f33. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ESA092400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a353949cc25dd088480049f5c8c79282365f0cede984182c7f70d612b5c8114. 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/DEXN82485944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970e2b5f39b073b5b10cc47af98086c7e73ca711978dddeac923c25bfac24cf4. 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/DEXN92436376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa77ac4f471483d68181445e17be695fa076e98b99f028bec66dad3df362a96b. 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/DEXN82497264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630891c84bca7b42c072ca7c9eacf8e364ade44283590e6c29d23b624c861e5. 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/DEXN82444220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c7f622710533a79e7144e24ef232584797b12be4574fe88d44724a346d69b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZEB2499044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b16cd7fc11c380323aa768c998bad8845543e6c318113378f4b6767c6cd9f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5FN2567827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c7f622710533a79e7144e24ef232584797b12be4574fe88d44724a346d69b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZEB2499044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8474e09ae8fabf8966379907a2f307655d67b1cda082ec6a1a09cbf4ea8c42f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FN2569123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec2013aa8374e38ad4577dec10ee8e87a5ed305fd074f8dbc8ddcf9f6cce96. 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/QZ5FN2568518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b16cd7fc11c380323aa768c998bad8845543e6c318113378f4b6767c6cd9f. 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/QZ5FN2567827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757c7f622710533a79e7144e24ef232584797b12be4574fe88d44724a346d69b. 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/QZZEB2499044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf503953c9797e9f2c32ece85c8bacaf90efa4fd8dc693e5002a71eb845cbfbb8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBEWA2503791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0606cf9eea8d26fa54c45c03969cc9b174eb2135b4a71da4c25369755a94fbea. 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/QZWDD2239093.