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 0x3ea7a9396f3bac5bb4cbc48334f85b4a716d9c06cc5a023f2c344e843a2b4739. 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/4c2853cb-ecfb-49db-8785-221b89ecaf59.json and https://artists.proofprofile.net/proofs/artist/4c2853cb-ecfb-49db-8785-221b89ecaf59.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 0x4630925ce0169e83e1f22340609e0ddc3466cfc36ad6d37e9ec01b9492a0a28e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZHNC2167475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc43ce02e6a30ab4c77be7203562539c597a1590832bfaecdc6499e76bab5c25. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHNC2167476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9879f8050bf513fa34c489cbd01f31f05b8402569d5c0d6edd3b8100909b38. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZHNC2167477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b8f2c2fafc84e0b27f588cedeabaa747e29372a499e7ce194dea36d73d8956. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNC2167478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b80783645df44614fc0a0eba36a53695ace2f395dd33e143add387f2b342890. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHNC2167479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5203828c3c71dd6ed24089e5504cfbabb94f4c79ad933d148873a74bd71285. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNC2167481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4815f5d97c2552bac2dc35624a536807a40d1684c990bcdfafe481aa51c0ad6d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHNC2167482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df5d11731514cc0a021a3d4a19f75b3f39d29000bc38229c213800dd09ef88. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZK6N2580316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4ce2da0fa9efa332963fcbb02f7ba9bd7afaef13dce92150abcf91e3208350. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6N2580317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d360df9fa92bb27bcfb33430c7e4ac65ec0af9a0ad09546a6a327967ceaff2. 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/QZK6N2580318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5a18d5ce63e10287178714c871ad2fb603d7a6c070e6f8afa54746ebcbc47f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/QZK6N2580319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4bc34bf06b0881ab565d60c1f55cfae567b59952267ed7bccbc664ce46ebb2. 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/QZK6N2580320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd197b907d26a0ca615a6c0088fd8ddb1625c04886e20465fa4fab9b583e3c304. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6N2580321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccdd009e5dd7d669ce33f8578738ad7054d6e6980b8b9059d46323b2891e26c. 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/QZK6N2580322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12fd59a8e24fa15397c8bde05706699fedcc42202b980a5b532548a2f7e2c0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZK6N2580323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6e2bea58a4ca798e610afab04dff8f77be36a4a1ff5c82bdd0263a4a30020a. 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/QZK6N2580324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7a802148b3dc638f8427c5976296eb5d576af07afbea819cba019602fa7a8d. 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/QZK6N2580325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c1b7beacce0efd4349d10c15775b462c69a9181a15dffcfc4da4f162438998. 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/QZK6N2580326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea38012efa9d9fd615dd59df576504493fefe270ffa1afc6d2ee7ffc306c8101. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6N2580327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27fc3bce6899ed1d55e3c73cd77122fb539d58afb853289dfddcd12a77a1ee9b. 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/BK4DA2462480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6597ed1403406fbf904e8e46475735fb74d0eeb7957414f3bb40ad4de88760. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BK4DA2462481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865e606896f6e548bf38724e8351af5d87d956b7d17dd78b4dcf7e45636c670b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BK4DA2462488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481b9d453e6790c9efe2e129212fa397951c57705479648ee3d5fe0fecf28029. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZRP52114950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a672c2c4756894ac50ce4b73ef6b815edeea54e2b980158900d15d85fc78f5. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZZ7P2449279.