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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4673cbec8f01d2a1254de0cceb4bee68c6fd6e4b3ce5e44c399544b9d15946ca. 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/71ae6cfd-8a65-4494-b345-a0194bf49c99.json and https://artists.proofprofile.net/proofs/artist/71ae6cfd-8a65-4494-b345-a0194bf49c99.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd96478bdf94352f63ed15b3b350ace563b8c3fe4555475c1e55fa839aa6e9b0. 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/INM432400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ece4aaa82b9f08a9a8d0bb23aff3fa709d8b76730f0c8521577b4cdce3670e. 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/QZTB42374152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9389e81c3b0c91c46ecbc6040fc00bf7494d266c2dc64b317180b5c0d879a94. 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/QZTBA2376339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2690551bb889e40ce06be7320f2fab7d7665d6984f058d8d1b989968290dc. 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/QZTB72302138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6524c14f30e40c6c6ca67c6058b3d7a5a563dcaae852c1bee5db15154dd961. 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/DGA072305399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30157533bd604ff22050786fd9a49d520f8d05390161f27cd8ace3fb021a7c9e. 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/INC622215421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798ecbaa8610c64dd65b524eab1dd1f84c13d2e17f6c9bebd3e655d868c58d16. 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/INC622214613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24ebeefa7c6c5a661c12bb4f579d89709b4e3bd98eb52e8d33d9857bd069895. 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/INC622214132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7d7ce8bd1d7c933389663921f08d04329458e8d7954bd28a302b401506ab84. 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/INC622212149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7157ff2c18d83a58794cbed28c103f6c4b1d11649485855cd82ec8ac10582bd. 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/QZTAY2303713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0924064ff660f65dca690b91c93f76050cf5111530b297b7c1df20e32f43fe4e. 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/QZPLS2310008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dfd8c60b3dd43dc2d9ce2408f7740863d85ecc170ee5d037833e181355c3b. 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/USHM82332712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0255eac0db8fc7b1f628c12c1d9b1a3919b4462cb40a6c91959032e193fe500. 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/QM6MZ2509265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e91b866bd6fbb6912fadef40e02c5f845686955ff2158dcd66938e578574a57. 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/QM4TX2515233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa031761b44255b4275320aa67994e69ea11c0f5f93fe25c4a0e1c999740ece8c. 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/INS922500134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabea78d10110dd3c0ff2378aa2817ac9ee764b620e6d4a54dbc6898bc4394331. 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/INT132400819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856c2ff96cbe3952266d788087602fb0ed535486c8e358ebd0e9d8c8d7266a1. 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/INC622217208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb46df73f90f6ba9aec818e5db4596336829b62a3b2a85a1de45e237671c3cf3. 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/INC622217205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fba3d48f4cbcbe3dba2577d0c4f8d6253e50845bc11349a5b477d4469d38775. 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/INC622216757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5232c3a109b00afafa2f1b1206d965e26e046a66ad105c46ff121f5470b78806. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/QMBZ92598589.