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 0xb055c67664620204d186cde17ed943a923084827fbec2dc4fe0f71eaca206111. 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/89e52ce4-e48c-4791-8eee-624a96d47408.json and https://artists.proofprofile.net/proofs/artist/89e52ce4-e48c-4791-8eee-624a96d47408.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 0xd40ef960a98ce02ce74807ede275c01702d30d14b969992ecb62ff768c7d9284. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/SMRUS0060908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a2d57cea396411daebd7d1487fe8fe21d6371c8de000231cfb308cb67ee8c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SMRUS0061460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca5ee3c6ea503cfaf4afebeb0d90b2f9bdcf948390dec630040953d16b6db1d. 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/FR59R2027561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fbea78d54ed62cdde385dfa8cba6b1d6edc6d33d24ddfd05a0fd8c22c40d35. 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/FRX282099203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186c1da6bb22849919acc7ee7192b8dcf88952f37bedf93ac4904e291dfb04a2. 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/FRX282099206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2bec06ced9498367d262ba30adcc2785842e37891df37bcb3c471016d4339. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRX282141097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06d18d51db0880a73169f26328123df4f7279e6c9a5f40ba6039fc52c7878df. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRX282141098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95195c952e43e5caae6fb81ee2c4e34950c2a6359c2316cee9fc9f52f88bcb8a. 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/RUA1D2363160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c4139d643382baadce0ba7896b0d68359722ff3f40d1383e18b9ad23c42ebf. 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/SMRUS0071908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd371f6d37087b538da750e1bf99e34de291f0ab24fae375160896873e15d3160. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SMRUS0072408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be57ea04bf8dbbda7ce50892037845b8263afe0af1837adf9f773e33b6b5498. 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/SMRUS0072409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8b4117de950f5e23066e325d9b3dc83c8dbc8941ea8a3d1a19605221eaa56a. 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/SMRUS0072410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471e35ccc53457e3d7a5ca947202fdc21e1922c72b7562e5182280addfcbd906. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/SMRUS0072411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af484611c479d934173c0f23014ee981f95ab5c8a3e269b8cb1dbd3260d49b7. 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/SMRUS0072412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a313d9674e0c8a5a7269b0ffa1ece5db2753200e0ccb38d1bed4bba87b1416. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/SMRUS0072413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da2a300e051e157376723c751fc9251b503a42d419dbc94d09500fca1fa1e4f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/RUAGT2476087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bee6cd8630288c2ff3d3bc8891832ef66837e76e772b5f12df4fa06ca96378. 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/RUAGT2476088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef801f37b0c8056993c1d4fd21e63663e4a420a4819ca79f779be2ef1ba8e81. 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/RUB422402449.