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 0xa1ff4b8baa0e6d2f50975c949adf824d2253978b52c100b2ed4f9817132b10a3. 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/42947812-3703-4d36-b8c1-f7d2df18ff03.json and https://artists.proofprofile.net/proofs/artist/42947812-3703-4d36-b8c1-f7d2df18ff03.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 0xeb53d4584eb809e03c51a172bc22b642bddccb910aa1fa89cb13ffb7aea4f8e7. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:41Z), 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/QZZEB2421739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a82ccd732ba45bba0a2a93028ce13a561724c2dac4d6071dd5a1f125c5e41c3. 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/QZZEB2421746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0616834196eba415a1dae6f08da57af6bb01defd30ad1ae217844d57d7abecac. 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/QZZEB2423771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d428441222f010a2e298f17609d22ea874caccd488da572891756799d75ab3. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZ5FN2520138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8320fc148c7cf4d2ab934a37bc43c66f87b5b37edd778d5c6a3251e3627f01. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZ5FN2520160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee288c1b30e0f3a24cee51dd8f241f5d8c62b59cc80ae78ef7d395afac5bd50. 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/QZ5FN2520197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d09186689beac80b8e0d50ffd67e1c144ccf63166f948d79d3dcfd50caa8023. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2596013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12905a0720262f795c17c39adf2ab6390a2fe2f4c39341b90d3a9f06626a8095. 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/QZ5FN2596055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72aee5c77f75fb421ea026eefc8373d370c1760ab56b69d652b0fea18a89ca30. 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/QZ5FN2596104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795baee6a0e89cb0c6de2b7c2405c07687ccc6a53c5600b98baa782c9d05edaa. 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/QZ5FN2596119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061b6ce700cc68e7d6bf780caaf383b0a63ed005edae188157c1a7914eee9a6f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZ5FN2596142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63370d613e8e04668b0260d50494a1043bb8cc16e91fbbf05b66b63e25f8ed9e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWV32489769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3557050611141d7b5329f97c2d2ff4b0b6b130ab15df83a21d1beddfacee77f4. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ8A2414947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a34790c600110cfd699577e8f29c54a8509b3114b08e14c07456594aedd2f0d. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ8A2414958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43359bcbd8a121d67362dc21708eff6708df38a6a8f845abec5b49f460ba0553. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZZ8A2415175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe367ea6c770abe7708013843efa4bab1ede65abf40eea4c0c79e4bfe17e9bba3. 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/QZZ8A2451324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144fac79ccadc013912503c1abef8aad82937f8663991fa5721959599cbc86ca. 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/QZZ8A2464135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149ae42c7573ad139e0c37597ac4c53eaba80a973d96b0397826f7fa31970817. 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/QZZ8A2464137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9e6e136dc601cc15eefa645b000c2aa7f5ecf29d08f11843eb007be0d433a3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ8A2464142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9f225bb8377ff52c44a702075804fcab664d9ecfc39459ea126ef5c5ec2dd7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZZ8A2464143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf274a6553d5eb316cabf1d727f6ee56cac15223d8a9c02a479acd985b20499a7. 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/QZTRX2528949.