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 0x4eb6b50fc11e67cd70c105fda701394c141b1748d7de9d07e1937f126edac7c1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1272dbf5-2482-4c2e-8edb-b6838d8ca865.json and https://artists.proofprofile.net/proofs/artist/1272dbf5-2482-4c2e-8edb-b6838d8ca865.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 0x8f064c6b99dae0cea56f18944534f21c409d4287d31c681d2492cb5cbb8cc82d. 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/QZNWQ2450144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c365d10cf140239c3e015da09f09bd8b2fefab4e7c8800a8b08c39c4feed694. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKNKT2402703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64faded1f6cfbd2e69a861e0e41212c850c2b38dd769cd27e28c65157c280bc0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJY2472471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9390083de0cc19aed9f5e0d3ba505ce1db159f1e58bf141b56aa0f1c2ed39f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXBAV2216526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135796070ce08717b6d31bc2a1eab8d205b9718bba9283f5fe71710d58953d83. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWW2467126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fc3f79ce686c67d826bc06fab775c00aa04a907a950a1258cf44e1eb16043a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GXD7V2390206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf476fb12b3ccfbd62084578cac32e423f96fee480ffc7d9ce772e74481cbd57b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SGW502435656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcbaad13bee97b96f6ad5e7b3c9c9f1d8bc6f89262a6e64986132c13bbf0665. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SGB502464281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc2a843f4ed4f375f52d2862b2a60a95c250c924ef0c21ac2a120b347bae760. 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/SGB502439068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216a73c286fb833a4fd1ee32f7415afe7a9728e629cd67a34adb6a72162e2a20. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SGB502420348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688380b7d30d4d03fef43ba0976b0ff784a6b09d2c767421bc59ade54505bd39. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX4IU2357877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9a8e530c18715501e8e0e2d2beee9ee95b6d0543f9c421a42a723125567b93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GXBAV2313386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cb8c1c588ff9988c41adffb8c7d0058b0c54927fc54cf322bc0b4665819a6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SGB502350744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984aa1eef9ea22e441c0d9292f75cfa7f194b8aa8d1c87a118cff8764eeee44a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BX4IU2301892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc566651bc2105d154f020d5baf9ab62cb28ce35fc3ed47939b5416dadc9a8516. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BX4IU2502318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe19e236c57611665242927038ab24a31a2a3e9f6eb5ca2c255a5215254c5872. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/AEA3A2281891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25ede4079412d09f61c5805a9a53a16e192c325d19bc2dd8928bb67927d6ba3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXD7G2247707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe953aa9cc51f2a08dedd9eeabf3c21e3e602ff559c10140cc5dc63f3d8744054. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GXD7G2201731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01641ad5f72b19cc2176b31a75f8d8377c287f569db8d8f92f8ffbcbd3b02c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKNKT2402871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f22c4bd7e76bf90ff2e327a2b895af0b2c6f6a1192237c31a081fe164ffdd53. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKNKT2501326.