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 0x41588822b29fb98ff2dbbb671928617beabdb14ff9e792b70e1a8ae7ec915b59. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e836a3ac-3ebc-45f0-b703-d624d3ab790b.json and https://artists.proofprofile.net/proofs/artist/e836a3ac-3ebc-45f0-b703-d624d3ab790b.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 0x76291e3d92960466e4c2a0c771ac38f36a84611c08b5fa18b7b91c54ac998e98. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZMEN2570590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3e81d9f3aa51c06c90f868c892b68113fafacc79873a7edd0fdede0203e901. 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/QZMEN2594135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10207f8795a861b4d189c685747d03adeb2cad10a8db71f9a707bf43068504c0. 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/QZMEP2587469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958b027d1409839e863a1936920735cbbdd6d27f35f703dd0023534b1546b6c2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMEQ2500949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a84587bca2b0bcc377a1a40838f720bf6cd07971531a3f5568849c6df6b8406. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWU2539570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abba3f78b8280d86da25844142a91c6a522db6e0a123c2c483c60db938316b0. 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/QZNWU2537796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdb2ddeaa43a282900623f89637dfcaf5e5fb5fda0ceb055c060ea824e0deb4. 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/QZNWU2539572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628f6cba1bf5c984b66a1d8dea06f329057f25e9853365871067c0c38d9fc094. 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/QZNWV2537603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5289760a0b723242f10316cd758f5f2f06b5835710c0c47bf5843c88b13f7d. 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/QZNWV2535616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6bce48302b28f65a3298a750122ad053df5cc329fcad7e4bed996e0ab234a2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWW2510537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b96e7014a45c3d9af84173a7f53bdf74e41560a69f3b7c132e50eaf0be991dd. 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/QZNWX2550155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811d57c12d782b02aa8fbe638afd9a9a3ff9f52ab54b0ebf028dced621f65de6. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/QZPLR2580016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d864115985ef7d5c817b60695972fcd39754b6332d54f83ff36be121744f8. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:07:11Z), 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/QZPLS2533385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde3d311f88c3b344b38eeaf626b181ce2ca6b99455fa6087c0a7e9a17acd979. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZRP42515629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88f662b03d21dcc653fd2e2d670f0a37c06b9c3409335330cf30466c88e6517. 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/QZRP42578689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64836d01bb80c217b43a67aa69a675431395e04e2832655c3aaf35cc88f52cf. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTB92543601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c8fdb2c1b967c3f00250c5310e0261285a9d8acc8469bd592be7172cbd3a8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB92541095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfe3f95e1d660a4653c4b54c660bfe04b3c16e8f9a91082242a7946c49aa332. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBA2585525.