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 0xa96c66e37b999d70f1847a2059cfe8f4fa16d93aedb2d2a7b797ef6df4c1c3c6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/796b827c-1817-43d6-a668-28ae7ad4ea2f.json and https://artists.proofprofile.net/proofs/artist/796b827c-1817-43d6-a668-28ae7ad4ea2f.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 0xc6b4003025d99753c0420dd7149bc80fe8c5c7a86b421a31548dc1928a1e8725. 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/QZK6M2480926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd58bd4d695db468e3144d3e4a6cd3c0cbb900ed5bdb6950aab9b6e96e2ee89f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN82573103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d5f72ee3fc6918de643354fd36af040e110a650a331fb2c80a4f5c729c4aec. 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/QZMEN2555561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9b60f82928e33833c3c031c4ad0e8fdb2ebda10674c31746dcdc6fa00bd3c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNWR2521540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400847e3959e0be22402f9322f61e02232658e182d2f855f4ac47930d521b5e2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWY2514769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f0bc3f793300ecd9ffbb42a8cab892e884554c945476b66d2f95c2d096b747. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWY2514770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5855956899aac1c60a657ddb21b03b606046d3df1fb3ea5bd901030bc6dda013. 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/QZNWY2514773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca8b4f1da1af874d5540c964d104457c9253d5bb680613633385cdfb3d24e0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWY2514775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c726826b0be47bb7a28889eece07977186873ae039366a6d9776cc039d59501. 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/QZWFG2566944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1df6e7c14827e6742551d53736f806799d43c23609285a365f79af5cf050792. 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/QZWFW2591548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3a0810069a1d67c275c3555efe6b0439d8426bf68217c9d5906bb8a8e76f71. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7Q2549982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ede80827964b781cb5d832cfb4de6f1ebc1a60ec867b23b7171ae5e9f8e838. 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/QZZ7X2598510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6524e972a87b1517fe6dba401a2f9ce86e2b2690b732b55742a794eadb31a29. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7X2598511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a561f063f229fbfd591063854eab25efdaa593c248519a9be2b4e6f64bac35. 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/QT3F42517630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86f240b53f7bf54259fe4065601197839744601085437d897120d0f783ed21a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QT3FE2514256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd51cb6ce0c138deebacc53e90080a09a5adc4c14ddf366f01677a5ff58f5d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:57Z), 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/QT3FE2514259.