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 0x1b8060261ed04ee067cd890e7ff29bc7b0eea4cb568cd7c9845b02a1882db06f. 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/dabd9463-c865-4de8-aa40-ce95909eb390.json and https://artists.proofprofile.net/proofs/artist/dabd9463-c865-4de8-aa40-ce95909eb390.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 0xa82680deb2ef8c3abe1c7e755f29a61f63d5d458e1afed85c24b4b0ba39c04e1. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:31:10Z), 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/QMFMF1421511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e735cd1a73f00c08ff9611bce2924753784892f9e800190f3058340704e0951. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMFMF1421551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e337b8f9a1950d6decdf4ad4b04053ea34f8c8d53a6efbbffb9854134afe5. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/QMFMF1421509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ef98f560a3cf9027b907db6d2a7ce4cf146bd9bc3a43fce388f9702254e9ee. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:34Z), 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/QMFMF1421510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f202778116f160d2823cd83bc480401a8b2e1bcdef1a297eb45b75a9add8d5. 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/QMFMF1421553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f69b6f6451aa1a3baed380b1d160c4ccab268bf3481a991fc6ea232e1d22f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMFMF1421501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83381bc492a7466d8f5d857e81d94d7444f73ea4bc412ecf137dfb371257d17. 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/QMFMF1421502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc5f9bfe656dada17c3056b07c2a8942138a338fc3f1475a3cb4e1e6122009. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:49Z), 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/USV351406627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d83a1a7bd31b3ea18a1162ce139ab3202577679f7060d38554297ecb1cb8e5. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USV351406628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be3b0cd64f97b2500f89fcc32e17ec1443b2786f85c5457b1c7cc61f4411c1e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USV351406629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df4037378d59ed8f8a1413c4e846e5da899eef07a5f08390f6aa7cd6b18babd. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/USV351406623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774cd919a25f7657af1fb6a810bd7f7e804977d794f3861182f75f916e8128da. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:19Z), 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/USV351406624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8a1395ffc91321fc8789315fe91112791b3e446c0f031ea3ef3a9e274bb545. 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/USV351407164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1362bff9d19fd9113c9dcbc05e21940cfd6e0cc595bc66ca63b4a84fef3332. 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/USV351407166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75e9e8adfec304a46462950799d61ca59294bfac8d51b3a5ab199157e8147e4. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/USV351407167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98207f57e3f61f837415ff293194f076db36566b3aeb3354eebb0b92a5b89d89. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USV351407168.