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 0xd618c3cf48f904f8d14b51daf9d5bdb4bc4a11a958c12b3bb5f585bd5f6ea1ff. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a942379-bada-419a-ae6d-576d7802339a.json and https://artists.proofprofile.net/proofs/artist/9a942379-bada-419a-ae6d-576d7802339a.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 0x544b03d1aabcbbc6b116576f68f9f400e4ea5e0e18cc159049e79f8c0ea0137d. 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/QZWDE2248945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf38a51750f522979ff28c9c8946070036cc5a697508eeba18586050592f49. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:49:40Z), 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/QZWDE2248980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981f301f41d637a9b615d8ea4a59eefc9bc39655de549b3370ef6a202bfd2542. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:51:38Z), 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/QZWDE2249152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7baf38a51750f522979ff28c9c8946070036cc5a697508eeba18586050592f49. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWDE2248980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c58820561f9b57e1b4de504b50af1f5386c3288dcaa30f5f8ec2bfac3c5f045. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:11Z), 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/QZWDE2255261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c5fd4e5b87233d0b0d12b899b7302eeaf2a3e3333073a263120dbfc4b464b1. 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/QZTRX2377424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014ad77348b3180f52fdb036daa183434bae8343f3eb187c21ebc5fc83a2e516. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZZ8A2392721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437bce28ac05d279227000aa455a23b25a6e1855cb83b9dd190709c8fcb6a6dc. 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/NL8RL2338004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffed4c7e986e86f7c7bb8ab93e10217a107edbfbf67c6ef36601995cbd5fbe5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NL8RL2458877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3599030a9e8a9b08b9970409a37f4a03db9fa9de480db32d5af3637084c458f8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NL8RL2515111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c98b48b559ad6598eaf462af4932a3842eb3939e2ba4934e6c6be17166ec062. 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/NL8RL2514685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccaa521df28c6cb3842af41801280e9d69ce3d7d008134e5c28ab1d13a800b8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NL8RL2515107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87734f51de5c90bc45229911c0b7abc63e33023b0ce1aac16bf0fe4b7cd1199. 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/NL8RL2515104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b883933124c1327a218d791f867fa6c634601fd930f6bad823f47926f5dddec. 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/QT4K42565543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8570baefe88750f020756917b12858947d93769ceb6054eb1b27865dc30716f5. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:56:17Z), 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/QT4K42566371.