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 0xf725692e2c0d12e2ea6011cdb8c94f618f612b03fead88804325161fe877cad8. 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/43031eac-6d51-4a05-978e-25eb16d8a772.json and https://artists.proofprofile.net/proofs/artist/43031eac-6d51-4a05-978e-25eb16d8a772.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 0xa8c3d124ecbb007482738f538f9f5364d61d449ab5df6b1b3a6fa155bdafbef8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:26:53Z), 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/QZTBD2389845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f54b656f5324ef2cb80b1dd027e142f21136b37ce786507fcd1db27febe588. 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/QZTBD2389846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224676975c565b86b504f710f82c1d4632d6f0cf51ae62309a713278a2c5444f. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTBD2389847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319fbd05ee676d2ca17e5d8e4db3d5a5dd26bc506c5883714d7e93fedfcce634. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:35Z), 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/QZTBD2389849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a26e8d0d99b4a1293481b8bdcf2d4bce7714d728d35378ae87a5502dc9a1be. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTBE2353599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db978df19f46b5d3773b84d22bd4986acf6e0bdacac9086d0ef067442d89d8a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:34Z), 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/QZTBE2353600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422f42054e23f00dfcdf4b1eb32a4ec0966c6f1957c216311eec9af14d33b9c6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:24Z), 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/QZTBE2353601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb397793201a100ef43777a4097c1601fc6f9e3b966990be517eaa52a3d4e23d2. 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/QZTBE2353602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34c55ef52159544a0f61c03e63435227ff081a0e1b3c74eef41ec31efd32634. 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/QZHN92475007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46dbc1ca80fd71f506dd7ac5dbb7e1a8de4de63d8916821e612c432d105eeeb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN92475008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca30ad054492f4327f16cf4b29b334033633c8330b70cfe6666b3b10a60c3347. 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/QZHN92475011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2147812558aeecc1bb4471bdc308e1b1280f9cb0e03a2bdc643be62f7c229ebc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:57:28Z), 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/QZHN92475012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c015745987b24114abb07c5394ca0a167c56d2b6f230297ff4d456fec331da. 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/QZHN92475017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3f2108f04a3b07d866e80fcf36bf5331713116db56a00caade0e71aab46de5. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHN92475020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a065e2f8e0e7fafef064909d06d76ae13740f7da5898879192e3ff75088fbd. 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/QZZ7M2426631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549c0a554b6df453deb48c0befec29e1f9ad6ad6cfbe912aa6f77fef0fc417f7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTAU2510948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab31e7a493f6a7da1bbe7a870ae789ff0679c25753e8a40bff03b4e6ff10041. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:29:16Z), 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/QZTAU2510949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe185b39415546c7c7636ae4d4c1a29928155a950026b662d930a076a3af9eb4a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAU2510950.