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 0xa5f1efd4c0f3ea4ac829b545afd35b7d6f302a4f4a57d6226dacbc99c44ea795. 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/3e18a278-e170-40f7-8f21-c5fad5a90ee1.json and https://artists.proofprofile.net/proofs/artist/3e18a278-e170-40f7-8f21-c5fad5a90ee1.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 0x97e7f70663647f3075f816e3f2ca3fa4d5be7359f305b12bf65821fd97ed8d93. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/NL4NL2000819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa20a9fa0274204db25a6e9cfc99223f3f2d91cdbfa676e98626ad0ea62dc4f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4NL2007923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd493afc684ddc24af6eded4114f9fe5dc8960f0ef983c235156b8fff007ec676. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NL4NL2007924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1843c647ff270cded68e5af61929dbe0d4f01d500c45775811ca0e730541233. 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/NL4NL2007925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7addacf3508d60977acfda79ef9e7554bae796f408a97b8bbd1a49f123540b. 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/NL4NL2007930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a0a0e3bd546ee45ec8c21686af37820dba2ccea534a41494a6ae133f7b4f2c. 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/NL4NL2007931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843858e8ca219938134e16e24d66f3b4389ce6b56b53329c141cfd503ab8b128. 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/NL4NL2007934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b89f90c418866e5f45c961498a68e3e3477aa27fefaf8047b23cc7b57c0908. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/SE6QE2196591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d06ebde6d5b5bfd63588b2e1e54478e017225eef5781be1ad0eb81a39009b4b. 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/SE5752285685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797d739af9ca7819057aea6a6538c2af8adb503cb784e18481167b3bc70af469. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:20:36Z), 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/SE5752285686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3434bc0931e33ef2f950a57953f85eff0b707a2376da75a45d71ee02503a77c. 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/SE5752285689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a082bef02c44d301bcc3e2bd2463d917051676d8d3545ad48408724f4f8456. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE6QE2234999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53556e035a7ff2f9da6c74aae6f050f239523e91e3e6760c5042f3ad5d95f658. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE6SA2227109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e6ee1f5b2dda7476f637a7fcd6738f4529861056a7b1282f89550ca5fa36d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE66N2274623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d388b989d03241a0dbd01a3ce24589a7bd7327bb7bfe81600dc0526a0172f8. 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/SE5BU2341404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e7f6e5d601cc458de50f4ae04490128bb517a075ae69b9c1035a73d7d31e60. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/SE5BU2341405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b1d3213958aaefa417b4acae31583704fa8e7a243e9f1e002aa919d5e22585. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5BU2341406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4602713932a735eb913577735f36acd58977dc39938dd4b7a8482775c565b3ea. 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/SE5BU2341407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002e6ee1f5b2dda7476f637a7fcd6738f4529861056a7b1282f89550ca5fa36d. 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/SE66N2274623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fe5221154200121432225ce2ccb39208e208042b263e1800e13d24a9bed14c. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/SE5BU2341409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787067cf7021a5beab57219d600315c48a7e2fa7cb62192f219cc875a392f84d. 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/SE5BU2341411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989b1228d0e065833c95cb0998087d7bd13caf9a0a588089b5913a231dda3d90. 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/SE5752395492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2280978107ae9c1b93c4021c131e9817d2cb319085af25a165e191c5077379. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE6SA2376815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65818a3b1c6f9ccae654697ddb2064132d9f1adeba34054003f6e2bcafae6dea. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XW2360047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1d5ebf7910cde1497e019152afaa5b20db00442e3ba3987096efe63fbcdaf7. 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/SE66N2328545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a63f2517993b203505e72813ce578c7925372501a0a62452eb1ad9217838866. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5BU2424998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc11370770859436d350d963857d74c3b74591dbd9da09c29b1ad8030f99378. 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/SE6SA2454371.