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 0x15c5f92e8ad23d2b67e458d854c05710e707c37e65d73d0ea1c5dd429e93d0e3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e80d7855-c453-47d1-b620-c261da72f994.json and https://artists.proofprofile.net/proofs/artist/e80d7855-c453-47d1-b620-c261da72f994.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 0x96a8771fb5e9faa38f3dd99e2b545c1550a710044bc1d7edcb6299ac39ad1322. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLZJ2416011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b93cf8153c1d8f26af64d38f933bde4724db60730c5bba199e398fd7070842. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:03Z), 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/USLZJ2463706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d2e8ab6195b7e870cdf7116c44ff442822b82e12e73197e8abae73bc6eee5b. 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/GBRKQ2454619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d05b6d644aa2648663106a271e367c9394e80bde34c2300f5dc5bea72c1945. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:48:08Z), 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/QZWDD2418305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6497973b256e53eafa0383c5875e99352fc3728e18605a058d510513e2d74b6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:42:38Z), 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/QZWDD2418306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba937881eb9910438c6c88574c40fa8e45f3f1184033267f265b7260c06b68a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWDD2418308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a8100df33e80e16311de859256af6b3c180e5a49d7246791becde82d22e14a. 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/QZWDD2418310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f30838a267c6d00ac515ab149db1b2f22480daa6aaa6e28e05cf8bf62745930. 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/QZWDD2418311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff4ed4134c18434c6a1b67babf5b85a4c4add2b60d1b8fb25470ecda61d5d7b. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:27:39Z), 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/QZWDD2418312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb37aba1243f557418eed828cf8200226287f26340352b91b366c11233e9c8ce. 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/QZWDD2418315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09613d10936548ba2ea102f71ead1765f58689253afac85a8813e0bf5660cec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:54Z), 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/QZWDD2418319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb60a54f5ab9575245c8d3b4d1188cb4dc14115188840e3dac3c7b0e5b53bb. 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/QZWDD2418322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c554a7f94533ef8dc18fe3b0b5c504284cfe7f04447d894cc38d7eaf980050. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWDD2418324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0896548afbfeb33c3a5dd962fcdf0eec9978cfbd94392d09c771782aab9b7647. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZWV32448513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeee14311abdd786a313df164548ba29525eac4e2bc03e245861ca7492c405c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWV32448521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e9fbcb5e0076be6b623e3403b22f4b520b2530658b9b6ffbb5eeb264e75f3f. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWV32448527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477d2c295b4431d3563a1657e2690a929702d966abff2f278d8f9979adf9dea1. 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/QZWV32448531.