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 0x3ccc67a66153cd8d71352819eb42f1792281e932ec9fcb10b5cc4867d8096660. 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/136eb25f-c0d1-4fc4-b876-18c04668d3f9.json and https://artists.proofprofile.net/proofs/artist/136eb25f-c0d1-4fc4-b876-18c04668d3f9.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 0xf653e43ae16a9b7811953590fbce168dd1ad112451d63c35ab68175181bb7168. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:45:55Z), 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/QZTBC2392205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb197f5a12de2cfc4834f75020505de73a4cd3fbfd78eabc96ae8908830b834. 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/QZTBC2392207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ebca657a572801ab0f48a824b613735b0ce8515ce3ec5321904e4cb620c722. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:40Z), 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/QZTBC2392210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e4a05f2f8086841ba20bcdc0bad34cc7f8bf28a009d73841eb7655b241455. 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/QZTBC2392211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6defd1cf3df4a5d07c6051aac0e8478fbac02e855da4fcca319e9a465e420ca. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:36Z), 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/QZTBC2392212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dcc271b97e16c72a0f92be7a239278c1c2580f39a8c15dc95046cbc17830c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFM2340718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fffc7558c14bd349ce2ea92c6e0c362c64e8eecc386f522101f23a04630b79. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZHNB2427201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c08c796ad2cd6952be170bad5b1f5f6b11f00f0ae600210e3549d316ff93424. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:23Z), 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/QZHNB2427203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a416aef764e055c87c6bf589a85a5de0b153a07c48e0b9003e88a6c8829435e. 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/QZHNB2427208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2c857016958862549f6b420a7ecc50e35d88184299813d218b89b86a2791f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:38Z), 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/QZHNB2427214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fda98afe6579f9b8d1409466a8fb46003fa78c9e3326f3f462eacf2f9d7aea1. 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/QZTBA2470403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c4f2d576828ad73ac9d7ca8fe955dffe2cecef8c9bf35cfe660d21fd5ed5f5. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZTBA2470406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e3b94a5863f296642c90b6771d4bcc6e2721a9c1ad3fe36b988167e17609a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBA2470407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe397b7debd297ed480ea429790f86094846a23061b796938c68711684a2aeb. 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/QZTBA2470408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5b0c579b719bd2c8d11c4d3797d1d2335ed686ef9aabec918f7b2c3c371188. 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/QZZ772423607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea3f37711e176a08c1ca2f3ce6381dd553b7d68b6656bbbfba70f9392bd9a7. 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/QZZ772423608.