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 0xfcb94ba7ef48fd90392d163b97bcde350427855f7235879c90e020d1ffa7a1c6. 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/fc7f00c6-9f64-4cdf-928a-4f148e0ef506.json and https://artists.proofprofile.net/proofs/artist/fc7f00c6-9f64-4cdf-928a-4f148e0ef506.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 0x9ac18566e3dafee2725ee880e0596dc5e4872c19cef11b567919966caf0dc10e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DECE72500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20ec03952aaceb3ebee35efdc13fe999f7ebf5e9e5a048cf1134d2d063b122f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d8661291bc43c799b798f159b1564d48d1470e92ce889fd692ca683019ace5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022003914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd00db076069dbd163f9569ad96ce7fe556ac966083e78002ed10af71bb84d2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebdbd983dbe912a48e71e7c3f651d9a49855d321fd9c7988efa5c1bbb2b80d6. 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/DEQ022004228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2552d38eecc61a1b3e2a31beaf5a50441989f780f3056e652b294a35e93bba96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1656a9c87afb486f3688d8cae1dbcb1c7c9f65df9cd6550e9eccd0d1ba041135. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022003419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f269ff53531fbcdb3ceff7567a1c090e919ed27dd0a5d0a245df72b8dca1e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ac0f8772b53d23a5b019865a4d05e12184304fa8916045cac874cb2cb98266. 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/DEQ022004230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f707fd58f19080d4eaca63ec2e0fb62a6fe95567d1679490b7b1d8ecc5b255f. 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/DEQ022004231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b97eaec95abccf245ae3c8fcf92abfa30ec52d24bc5f2bc9f53fbb8b85feed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42447f899e15fdc7005bd4013b47e8ea551f8cb470bc7f56f2bd93a4eb662932. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ022004233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cbd639dbcd6edfc7901dceaba0a7a19f1420ed2ec87bc53f9e60ff8cf049b5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829ed7c23f9fd9dd25cd75e75cb1423cd7ded29f0f205a2099be90ef96266a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEQ022004235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de55f09e28051ff13dd962366a20552f0b2afabe94537ff3ec11caddb7d2e0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ021912448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a1ffbd49efca9a53f079b9f1d27302851ddf3e97aaf80ce9d37657c0679571. 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/TCAGO2207724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea07c267ec5634ed6e0f4c6176d81331f4491d74220db6739162cb844a155ce. 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/TCAGO2207730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b12413de8ba99413dd6a1407efb15bb2753d86585f03e6270c28bedcf4b340. 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/TCAGO2207732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fd6f8d145458273e7b24aec950dd59fcef83ccc39063831d8b76783e535fc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGO2207735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1547130071edf1bc8a7e30285878e0772fc42abd8870bcfe21af8b1a5472e1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DECE72000067.