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 0xecbd4d6f762d28ff5632bf1031c5b69fe1d63eaa16511773361d969336ca53cd. 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/d4559421-41c8-4bcb-a621-b4e57b7422c2.json and https://artists.proofprofile.net/proofs/artist/d4559421-41c8-4bcb-a621-b4e57b7422c2.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 0x637ad13d28f72278c55b313aab8730ee18f8e683befe4944b3f98928d79f639d. 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/QZNWY2331914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76868243af7226267f0fb1c8879653b85e0e30e45d95ae9bab9b6fded2b26a8. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWY2331916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9ed0e85d6a291071665e0299775e0dbe61b990f37811d1bb9f3bddee781969. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWY2331917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231c876decd7db2c774b214c8c2fc2261072565cacef4d0bd90dd1e51faab497. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNWY2331919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebbe4101ad75132ad6fd10bc4119e6f34e93de827a79a3b4cd3299cad6a4a32. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMER2469483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7747d166a4bc439908b6323ac64af864d88176e4721e44c7d79e96afe1af8e3d. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMER2469484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1623861f3a51bf79c3d22e5bdbb707febb08bcdaddecd5587b3223c18d9509ac. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:06Z), 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/QZMER2469485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f3ef5825312a09d69e9037036b38776cc9cc16d02f1bb1082b5b45a998b95f. 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/QZMER2469486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9f6960b72630552a185dc0ae2041824e8b14c97047d89935b0229451377ee3. 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/QZMER2469487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16378d273e6f0db3464b5143e5f426a0b92cd8576e1f03486ab995a8a4fe6914. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:47:26Z), 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/QZMER2469488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba55ede6118abc89db4fa7199ad5156f89badbabd390508bb1c58257424416a9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZMER2469489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd450ade72a0fd769c44bf183d0db5eee648d3e6707b3199af3621767599c4781. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:38:43Z), 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/QZMER2469490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773cd437111b386b8d47fb82bd032b34be4896055efb91dda08132080271d800. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZMER2469491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce43bdc5d341eff2c468822b43233cb00946139fa843e4b0270b56a0dee18f73. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:21Z), 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/QZMER2469492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344de0d22bb6ae057e9b2de5883b71aaa397b7f9a7bef408fd5b00fbb3a956d0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZMER2469493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865ea317502782f1f2efa085775f490603a807cb695a670ed640e8773d13805a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:04:29Z), 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/QZMER2469494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a01869821ebcbb5ea13e4736dc6900f5acc3217609cb7fb8cefd387173072. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMER2469495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf10c69082e42de4cfc71b5752b94eb5da16df1a2f4407e3804e37149cd6ddf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3FA2559738.