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 0x0bd4632a66c145208aa3effdfb7305bc10def5d0e0d6723071006c2cccc1b5d3. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9e7af72-b773-4706-a412-d849194a36b1.json and https://artists.proofprofile.net/proofs/artist/c9e7af72-b773-4706-a412-d849194a36b1.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 0x227c2a3317d3c3713d770199de6508636c0fb764918d617692d5699b97d6cc4c. 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/QZRP42213093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3557f11916083ead18d1740cb14c078aef3a1b3503e62f17bfb846f94bd2aa86. 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/QZRP42213096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd8d2f0bf986e23fca62bd759a5d0bd176cebfef952c43d08c6f7951631193a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZRP42213098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa534a1cf46f31f2bc09772573717f6b2fdd80ca43bad117ebca242a8813b9361. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZRP42213094.
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 0x2cdf51d83ce70b2ff93f23fc1be68012cb28465854a876b953ac5894907b13ec. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZRP42213095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf51c5c24f42ac8b60d5eca9d6282920e9f913c212fe4054c615fbfa581bdc9. 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/QZRP42213097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde60dbb342de87cfea047c82b0eb4f6b7f3e84c268d1987a92c768570e878fb8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZRP42213101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045cf5b116ea7b1aa5efb0c88789a46600d395c6258797ce734a2b61d38ef706. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZRP42213099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc831ebd6af92481ed90f79cb315e8d504fa4511060c238a21f78c618be2b0dd0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZRP42213100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98364aea1f546737a341209661f6666cd38910cdf6fb0a8ad58c89e76a571f07. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZRP42213103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322bf5c77f6aa050f2fa74a6e827606fc83c1f7270d61a89adb6a4eaa483eae7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZRP42213105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dac9bae623a0a53e222da60ca9c20208c14e2fc7d201cecf81822c7fd56e63. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZRP42213104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb83bba1b9558f069b21c881e9e904e5ae5ee3986b89d35a60acfaa19871085. 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/QZHNB2343257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6d1636de3ccfd349f0f5498066855e9f65ca124aa8acc900790388f60b17e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2343261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cf7aebf3af8acf5fde297681b236b664bc3aeb1b4a51436e1246520a2a6e6e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2343263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d8b2fdb6e4615219149ed93bb0f341a966db171ca26904b38beaa507649093. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNB2343267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed8f0095127ff8c1ce0123ab061b18400fd8befc9d3c99e996769d9b89ba2f5. 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/QZHNB2343268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffad89310896861934705fb58829586c43adc36c59113b2c441c82ab8495673. 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/QZHNB2343270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e358c5a6cffcf663d9adec7f83b878fa97b5b76fcb7429c4cc35140dca208cd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHNB2343259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c75d64a9795e0797914b0950b7a38d2698c4e052304741793e093604488683. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZHNB2343260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5222ba6f96cb579dbdabe5ebdb6747cb0c3d8aa1dc862dfcbbf97342f135643. 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/QZHNB2343262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf285eb553b6e6ce481041143bc33f41cc73b35bb1c2b05e46772490cae71e654. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHNB2343264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59dd1ddf1b4a7ed88a22057a37d875d428d1358ea741ac14c9841937de6871. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZHNB2343265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dcb00f6978aa3840e7d618bcc9ff5574f98c8ebaee3536a1fa2fb606da05e1. 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/QZHNB1951193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7e3014aa35dab26bafdd983a610fc8b564f1f8b3495db8473725d93b34fe0. 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/QZHNB1951195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0265bf021aec4033d2fab94f84ca9187f1bf51fc458508ac8776aba119dbc98d. 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/QZHNB1951198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1a75fca6602e4e68f42fc4fc4ff7d1679961fab8f1ee4fef5656700c87bf6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHNB1951202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50b64c6c19377de3ca017bf162af1330d5911f67db2533dc66411f10465ef84. 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/QZHN52403162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cff9aaa3ac8e5dda142adb90a2527043717448586dae7aa41533f8be76a00be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES92487560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8fcb43e38f3c98288b19ee874c54253c64e118c82afbf3d493a3ccf948589b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEN2331819.