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 0xfde165db6e8261c6ab4365e6cb18f0d0e68ec804057d38df03dd1dbf3af99be0. 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/14cdf5f9-13a8-4bbb-affd-c2aa1d1ee750.json and https://artists.proofprofile.net/proofs/artist/14cdf5f9-13a8-4bbb-affd-c2aa1d1ee750.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 0x9e3ef35b6e4ac8d9acac01a6f0a9acc80d7386107b000b8f7a6c247a613eba8f. 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/PLB822300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301e15aff4d7d7174452ceb16b143dbf4211ed6bd8529f92bd5f5fe3acc4d26. 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/PLB822300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41565c35afa1d88573584902106fc708ca17c8779d29be4d22efae645cd33f75. 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/PLB822300271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0e0e7f9118787d59f5285376409e0638dac91d05e4ce8b95f793a9ff31d27. 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/PLB822300268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952f53ecfe4eb557deb2bfe622b7640990b38ca611bb3e4eb6e8e97de599522. 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/PLB822300269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301e15aff4d7d7174452ceb16b143dbf4211ed6bd8529f92bd5f5fe3acc4d26. 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/PLB822300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41565c35afa1d88573584902106fc708ca17c8779d29be4d22efae645cd33f75. 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/PLB822300271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde39edfa9808cbb1717b9ee333d0dc67b89f2eb0cec3cadb76d6d5a3619dee5b. 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/PLB822300272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d87c6329e732c4e26e945c757d6c989dac833e8284e93db46c3d25ac6bd0a. 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/PLB822300273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91756b915ac575552fcc143d494411e3002794a8ff649f6812afffbf431401c. 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/PLB822300274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3ef35b6e4ac8d9acac01a6f0a9acc80d7386107b000b8f7a6c247a613eba8f. 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/PLB822300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f32c888262749903bc32d5814395e9f5f1aaaabfa6f0f4174a457b044a57e5. 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/PLB822300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64939e0b32100eb45ce7d6c2e89babb24691abcc86afff192642cfa1de61b4a9. 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/PLB822300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf699e86b2e4c9419792b17639c8c7efbed0cfbffc702fd8e5bc4fb6fa2846e3. 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/PLB822300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4473467fbd790b8f131aa5b11b4eb3274a198706612b77b9c76a2e2755e73487. 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/PLB822400219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa6f622eaa59aea7c19713c1171ab7f61f2cb6ed1c69f0378af6230ba22fd01. 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/PLB822300238.