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 0xfcb9d7a095d1ce192b8bf76364d09c174a6c0918b255c635a025fb5d4536b9fe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c303826d-0230-47a8-bad0-4c58c4efd08f.json and https://artists.proofprofile.net/proofs/artist/c303826d-0230-47a8-bad0-4c58c4efd08f.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 0x7c4469e9c40e94bde02d407fe479594406f551ad400da1db22fb070ef9d81a20. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNW72301979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4967d999e1c8f2826c4ddcc1fc343d2101c60b0b7f705cc3f85ae98b54a4a0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:44Z), 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/QZNW72301980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa583ccc112d62d162f2105ba2f834f2045fa2f0684824922395f26849cce93f0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZNW72301981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d8ab5b2550b7e1222bee1874640cdd3c24893d33c940d50bc2a63bd415676b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:28:21Z), 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/QZNW72301982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac9a46d44d41ae5c6ff1ff22206148bbb6159cebe65128ca02761841793d61. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:42:16Z), 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/QZNW72301983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a3b32c31a292d5f3995240dd2536b48b4a40425944cae1347f59b2c7d395be. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZXLZ2324005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aad836f239c191620e9018f20eb058ba6371701101c3022721cc435c3bfac1. 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/QZXLZ2324006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508ac2c668bf7d06e8edb7982505e305be7bf8ef812b55ab0585cbe283f5afec. 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/QZXLZ2324007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5abe71a41125234c4875766fde964778f1dfa17c2247a4af8306b147f9fcb2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZXLZ2324008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038278131b65cd52940f157b66c597399cdfe7b8e7aa84683a019cb8eeb05434. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZXLZ2324009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05204fac717abd63c1a76acdfc1401e77e867fd4508013a305d4dca3bd365ac. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:04:34Z), 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/QZXLZ2324010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c0b2fda55705edc1a6a587293d2147f15f209a8a4e05891062d48be6b452de. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZXLZ2324011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042031a9a44cff3fa1d70f49b19cae57e62d7a3c4324991a740b458767134f84. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZXLZ2324012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc800cc057b4aad3bfc8215f2bc1371b3b208795fbaf78b138923c22f7487a81. 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/ESA012424526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f99382e12a423268787c6b38e40bb23dd70fdbb3dad24e505b044d226ee9b1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:51Z), 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/ESA012424527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edf826bd9d26d6ba77bba4f16b4b3c72874c1b7be8691561d82b293686a48ab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ESA012424528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2333b1c4f9da8f36fe0fb07e957515285569c4e23f065d03f385fe8fe603a430. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ESA012424529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf259c05dddfd66ef7f500ecc53d8e110be959fbc0ca42201902fc6298f6bed1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:07Z), 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/ESA012424530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf960d844cd46426e96795fb8d47500616bfb5a3dce6d70ffdc6b65d31df821. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ESA012424531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf3b60c1212f877f0273970d7d3a8576eb34585a5d99bf73327063f073159f. 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/ESA012424532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8746f1616d519f84016b224d714181386536bd580db998f562bd49d1b7cee40c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:03:39Z), 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/ESA012424533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb934aac854c504260978f38d1db7b01ef52a36b3135538421fded2166a71b04d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ESA012424534.