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 0x189821391f3ac79e13a1496f571a23d68f044f4dcf3248cc09d467fc54e2da3a. 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/d000df64-d2c4-4191-98d9-64c3d1a40022.json and https://artists.proofprofile.net/proofs/artist/d000df64-d2c4-4191-98d9-64c3d1a40022.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 0x07049719986d81e466792015f5c9e4df6fc76dbacd674240f2666d1e76c2fbb5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CNZ511900421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b08b8ca543a7e8a4bae32c851e9034d1a0800767b0e4e150bb6748aca95abd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/CNZ511900425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f27558fd0a803c3c1a6ab0ae8b2f22eb02bbfdf081b5e2f9929b69ddd1f351. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:55:52Z), 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/CNZ511900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e32c64f72fc69e695bc6bb6109320a255496557db851686c26462b37c4eb1. 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/CNZ511900519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90e2b85ff4c1b5a711f7183a43a8d3a9af423b7af723639fb30b6f8be86e9d8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CNF182000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75fbd759c98d87bc2a792bd5a82aa20ea2b6aa5f2719943a639bcc5fb751165. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CNF182000277.
滾石40 滾石撞樂隊 40團拚經典 - 溫室花朵
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef053cf9ccb70573037eb5113415ac224b972547a69536c9248274d00edae1e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:17:38Z), 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/FRX452270707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6718b0cf254e8c04c96b3dfffe6c77d596a3556b941cbf7f19527725906ffcd6. 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/DGA082204205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe5965646afc8fd8877115df0c9e8c0cfa7e0f0cccc5d63a16ee5b7a91106ae. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:25:58Z), 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/FRX872300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efbb81b831af1d36a77adc4facdde511b2aad0c4882d1a853483fc2eaf80ed5. 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/FRX872300543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81397969c14b22a5269c0dda45b4749f92d7909421df94d5483ef60f1dccda. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX872300544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce059693e98fd77ca6af404df70cac16de7150031dda45f1864163a5d08424e8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FRX872300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94639dcea69f9189befd862c0bdce20dab320d44a67c4a3b3f868d1e5d9b837. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:15Z), 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/FRX872300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c7509f9d7f08b1fa414d2b310a70c41fb3fb814fbde7de7d3547057a761cd6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX872300547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf889937844c1e4f66cd4e3e94ba9d820a9eafb326c224d19ad642e4a8ad7ab. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRX872300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b75376a138dbeedd2b698109ecc00b9da713716e34b9c0c6b81c7ce83b9751. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:53:26Z), 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/FRX872300549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec760397640529e153eb3e65c23318f0786963660f2a1c8505ac54ba51b2064. 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/FRX872300551.