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 0xfe2fd789cbcb70617dcd39726e0818b798717e122fe64884c02cd06a17b9af25. 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/f0dd71ef-2177-40ed-9f69-8430ea9b0588.json and https://artists.proofprofile.net/proofs/artist/f0dd71ef-2177-40ed-9f69-8430ea9b0588.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 0xf1e0357cc524546e6d765cf710d14c804f294b3bc81613ebc507fda8f0544b7c. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BGA411001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679a513e0a6ae409872bcdd322d066c0d91126c815322a1d0275d100b7f3b093. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/BGA411001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5defbb8aea93d637c6eb8f749084582696d7b2522e65d4e81e404edac17c62e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BGA411001008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704d511c813d99afb724921f4b2ca52cfc4d60b0a176840ca6a1ff260fb79bda. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BGA411001009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f086e9a545a69642d27914022e8b40db30d79f0887256238fe67c4960d15c3. 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/BGA411001011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada2506ea63ba1f5828df4dfc30415c17860970c836eae6c626f6574a88877ff. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/BGA411001012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f5e784a44b54cff5f196c5b63c20bf6684659010e3529041c4ebb6a5e4001. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/BGA411215106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742ee3b5958f0ef9edc665f0f26df8fcd0c9551cadd2ae11e5462c9b6fe892da. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/BGA411215109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fec2888990e2ddde3341c95af014e3c90dd0d9e4e13bb9e6c6ef00ea369285. 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/BGA411215111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f0d3f9b5ccb1b1e4cbb6dc95a1929c7ed57d8dbbf4543987ba124961dc5706. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/BGZ411801680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac6031ff60e4d1c2accde28ef72d94ad2124c7d3ad79dbc1a069b560460131. 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/BGZ411801682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9d700167e52046782d8eaa66b73d11287556597982e5b07a1b269c36f383e. 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/BGZ411800623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61218966f328ebf1bceb5aaf92ed31a75d658aac8e22123ce8d69b116b72d11b. 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/BGZ411800627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a89eb03d112f1ce51154331e5df8d2c5014bacbccf5498b4ba94037e8b4cf9. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/BGZ411800628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4370d176bb6390ea2474cfc2f281c67f57377613dff43e71d1ec1f35168a64. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/BGZ411800631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1600d7652206ca37dc8a4784a70c99e747a047b482d970b9b9ad85e2c2e948b. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/BGZ411801842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d889dd1b00191513ab137077acea7d851ae7a421bb8e565426f9c8f4a359e. 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/BGA411905044.
Zamraknala e hubava Yana / Kucheta layat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fdd0fcca8f33c1a4ed31c2f9a3398115d4d60cca20da4625fcfb89a803dfde. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BGA412000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad451457b581d5c2413c94ba0b7f15d8222a66168b2f2c68a211c3ce940bb49. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/BGA412000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4194d95ce59afec55e71adcdc27ccc7279d1213ea186946f31024c30229827. 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/BGA412100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x122178336fe2ebb8be3973a82d1542dd80f289ec5fb2706e0ec5ee603791294d. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BGA412100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9d889dd1b00191513ab137077acea7d851ae7a421bb8e565426f9c8f4a359e. 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/BGA411905044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29a30a05534aaa70c687214c60d96ea30e4c6084a3c683a337ec55e3613c0dc. 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/BGA411905071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1600d7652206ca37dc8a4784a70c99e747a047b482d970b9b9ad85e2c2e948b. 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/BGZ411801842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0375b25a6d37062aa06b109c6a304ece89eba0aab5c7bd824c49c3bff1888afd. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/BGZ411802153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5876e9744d9176fd61e0f1721fedc58f571952880dabe5ec7ad351dd90924fa. 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/BGA412200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1f440f92151d372f9fd59d6cca818660e5e63b6bd3745b67791ccb61812b3f. 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/BGA412300139.