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 0x06a2880f977725a0bf139c5a722657df0d3cfd49089f09aee5ed56e3877b55e5. 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/7124758e-9757-4fbb-8e52-1b289edd3b44.json and https://artists.proofprofile.net/proofs/artist/7124758e-9757-4fbb-8e52-1b289edd3b44.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 0x851e64fc1d87de0fc7a7fbd87b5f9c40e9d7c45e6884e4e024c4fb4d34847ffd. 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/QM3DF2483415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c457a33ecf6c09b7d92d135da9f8f23f4100669d55ea66741bdd1eef0814128. 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/QMANG2420756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4573aac36d1a6fe2b916be01f46812a3fd4bb5b3d2fcfa75445204af36c30e4f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2431883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186eb2c1500147c551771301263c19258f7ae286e709deaf176c50e4dbedd13. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES71G2414922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854c2bcd0fe412c3865e8869ad38925a29882b320159b6559ca5183191f95be. 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/QMANG2401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270eaf95fc019f00e3ac7d06595241ea614fcb7883c522a8302c14c254d37902. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2414924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c457a33ecf6c09b7d92d135da9f8f23f4100669d55ea66741bdd1eef0814128. 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/QMANG2420756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb166c9c647cb2ce8c54fd3db055fd257e8296b908cd59662cb96a7937c7fe80. 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/ES71G2414927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05458992976e21607756b7bb3e819d13931b3919fef6e264344dc821572e2b90. 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/ES71G2414928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e64fc1d87de0fc7a7fbd87b5f9c40e9d7c45e6884e4e024c4fb4d34847ffd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM3DF2483415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4573aac36d1a6fe2b916be01f46812a3fd4bb5b3d2fcfa75445204af36c30e4f. 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/QM3DF2431883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186eb2c1500147c551771301263c19258f7ae286e709deaf176c50e4dbedd13. 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/ES71G2414922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854c2bcd0fe412c3865e8869ad38925a29882b320159b6559ca5183191f95be. 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/QMANG2401503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270eaf95fc019f00e3ac7d06595241ea614fcb7883c522a8302c14c254d37902. 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/ES71G2414924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4126b4caf6c36c83a2ff6f27717f53d2e466b88dfca3033351c9905b8de8a. 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/ES71G2414926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb166c9c647cb2ce8c54fd3db055fd257e8296b908cd59662cb96a7937c7fe80. 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/ES71G2414927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05458992976e21607756b7bb3e819d13931b3919fef6e264344dc821572e2b90. 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/ES71G2414928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e64fc1d87de0fc7a7fbd87b5f9c40e9d7c45e6884e4e024c4fb4d34847ffd. 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/QM3DF2483415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea5ab0a70563a909c5323d8b123ca79d1f8330cb5647bd21e1e926e730b503a. 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/USANG2523506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f929316a782718d1c36d5a565a31ac610c0a7de3c46987765c8f4373f86dd. 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/QM3DF2526858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4697e63ffbed172d9493a39497b058ae70e9b52dd86f410ad3c0bd61e7dc23b9. 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/QMANG2467849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854c2bcd0fe412c3865e8869ad38925a29882b320159b6559ca5183191f95be. 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/QMANG2401503.