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 0x19a05a8fe578615b5d87021f4c6c0ec1473cc8eb1da9bd36dabd66a58ae8f991. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08dca829-02f6-4a7b-95b5-ee3ab87876f6.json and https://artists.proofprofile.net/proofs/artist/08dca829-02f6-4a7b-95b5-ee3ab87876f6.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 0xc65a9b03881a3389430c7aa3b6a8830aa7001cf761ce25a42b07492f0c2e7f40. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAHW2410252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bea2f669d80c8b6fb39cd35f742f78e3302b3fef5d8479236de808863dfb609. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAHX2448337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f130146ff8cac3331058b92b81a408a27e9d1f2077e870684abdc94f630ec8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIP2481319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99dd151036aa5020c91fe0e47181d5ed9bf431d13a031d73c19eb2f8151c7cc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJH2566244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410cfb3c68726a4bb4aaf55e5bf0124c35e9fdd2fcbc0b0c87fddfceb475f70. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:57:38Z), 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/TCAJH2566300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ca6aac142731b83d89a5503a576a0b7bb20ddd92971d4c4fb268a0fa46953c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJH2566319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc617cd4089cae9ce4986de37dff8b5eb3ba2df74522aea3004f38218786210a0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAJH2566352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281406b2cadf08d630657bf7cba9a515e833f6e7a9a20a7e5126760b3bfa378. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJH2566366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a4ca1a9a0314a7ac3512a2795a674cbdcbaa9c5176f884be4eedc224b97b5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJH2566378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc288c1411c1c4cfc1bf23cffbcfcac431694718ab7340332f32c91b09ec1403. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJH2566392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3532b45e66edd3d6429d7cb94563a3f0b21a0780d13d7307e4f548ebe9050dd6. 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/TCAJH2566411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657413510d37173908119b90b904a4e3828c82e538b710111cada9f6682374ae. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJH2566428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e588d36c8802ed4f0c215217d6b5485942de7a9327da2977e152124516aadfc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:18:11Z), 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/TCAJH2566447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410cfb3c68726a4bb4aaf55e5bf0124c35e9fdd2fcbc0b0c87fddfceb475f70. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJH2566300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ca6aac142731b83d89a5503a576a0b7bb20ddd92971d4c4fb268a0fa46953c. 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/TCAJH2566319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc617cd4089cae9ce4986de37dff8b5eb3ba2df74522aea3004f38218786210a0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJH2566352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281406b2cadf08d630657bf7cba9a515e833f6e7a9a20a7e5126760b3bfa378. 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/TCAJH2566366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc288c1411c1c4cfc1bf23cffbcfcac431694718ab7340332f32c91b09ec1403. 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/TCAJH2566392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657413510d37173908119b90b904a4e3828c82e538b710111cada9f6682374ae. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCAJH2566428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56d8d8a5715c546eaab22edc8c5031eae2003e8fabe32ad5c8a9d1f0975e37d. 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/QZHNA2444887.