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 0x24f4e46060238e18aa4d4ab1527a8abdc15732c5f4aaef5912d883991fd7d518. 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/f8caa97e-19e1-4da3-adee-5c34c8775b16.json and https://artists.proofprofile.net/proofs/artist/f8caa97e-19e1-4da3-adee-5c34c8775b16.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 0xa8eda2e24eba052d315ae0c5fabbe69c498d898b062374fe8c9bfce217ce5470. 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/ESA012589595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457d8e8cf8109cf6f8f4a5e7e4c78a0b50fc12e333327a5c99b96d8b47270cde. 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/INB942100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe535a40c61d1995a8144b99c6730ec64e6aea37b769c647fa75d2fe1f8af8bf6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBMA22048936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fed3afdaf5aca351d4f3d91dc1981f2fd19e83131f857d59a333e5ea68d011. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ESA012464685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc27344c982ff7b0fddf0b9c97c6737c4159dd149065dd73ae8fa9b3a59d763c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/ESA012464688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8592819cf304f37dfce43609be2a351b02913be23ac4e33c0bb5130c85f94f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA012464695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d002e1fd7822c42977780965bddf41e85de2f5b4bc19a99c1f05056750839da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA012464696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eca86fd48e265044451c4529f773d54bca470933be8430245cc1a1a4ba8ec9. 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/ESA012464700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b55234e551b27a83c78aabf0c87403c333b68470628421f0e189ac92073683. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ESA012464698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c007ea199ab88e2973d649c8a7c797469cf4c360793ff81da8280fa1ea49cf. 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/ESA012464693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc247d2fa1af1fc0d01966444300117ed980c5b48aff6385bdfad7d039e7c55. 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/ESA012464702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dd425290ae0d79967098c544dd1217a0a5436b76ff87e523ed3c74a22cfec8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ESA012464689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8506ece70af769b4544d2fc9a035492574da727cd17be69b06f7dfdcc15a4002. 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/ESA012464692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268cd6b5b21ef03115bc20004238ebc0fca496fa98d24713e916524aa4f75f04. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ESA012464691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7924d284e2a338326e1ea4511c880fe0081911e467f225705ce69eac934a1c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012464697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835dfffe3cad34096d01493a3b1eb84fa3cecbadd9073d469db3e47ba5366a75. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ESA012464694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9626f57e7ab773282f5d664b813f59707a4f5d5a6df83eedd5188cab88ecaa4a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ESA012464690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64459924693f6b60e92f1d32058ea9a0ecd181479b4ddfdcc193c946e410c2e. 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/ESA012464706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf05ba69e7dd330f94d6894d5a82415c8f01b92162be2986d8a2ad8bf8403ccf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012464705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cee6ad5871cd03450282b46d66d89b6ebf59ca63c28b9bc7783dc7573751db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA012464701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24652a98e94483841ef6c63dd5795c28f5b363a6958023503ec44f1584377865. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ESA012469597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3402e68dae807e1b8e68ea0de366ae0406de71e567a6e66a9a65a12db8e6e91. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA012469601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d36b6206cba4a55d94b3a15c0380cdad15e732fd7ccc260f9d40ce39a15de3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ESA012473757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baa40f72fcfb56b7e30bb33d4c849dc62816c2631094b312be2e565a9611aaf. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/DGA0R2453093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f79938bc94d4c602da087f4658d281c83c1c997cc14fbe3955497e83c9ea7e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA0R2451455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820fdc8451768e291158609c1483f6b5cf7ccf59f843946e48d4a6c51dc1948d. 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/ESA012490505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2774df97907786363c654ea88a32cc0dbbcd56aeede82ad0242f6c90163f8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ESA012503287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f54ac47c461e1af88e9cf72788ab1d09efe8b26491d6ac48c01604789d8fdbd. 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/ESA012585881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49974d3b3dae1e6c9ad4ee63034fbc105916fd8fc3864999eba6d0d689b0f79. 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/ESA012584205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38700bc3d9a219c736d0c83656d638816db1dc6ef02bcbcdd448d85ab56262a1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA012587878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294230d669d1bb7d8f91f6cc29541d001658738893decfbf8e1cb1c55b327da9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/ESA012591379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031aa740139ef0fb089d3ae64e21ac8351a671056a24a1d1f7719d6e246ce0f. 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/ESA122511765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e0885a26ebef5930dd1dc211fe39397e76dc41d627b979e5c4707a7b493fc9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA122546535.