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 0xe87b718ce69dbc1cf5336dc7e614b96f61c190263d6ad22b60e9f4720223d2cb. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad026a28-27e6-4587-9788-d1c4939b4592.json and https://artists.proofprofile.net/proofs/artist/ad026a28-27e6-4587-9788-d1c4939b4592.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 0x8ec6fc3ceed8e4be7ab17b9e5e346d583f849c545e7e02d112df7777eb370fa9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USDHM1718022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313c5aa86bde345b9e275a9392398ed44f5168cdfe83959990b3c1ecf7a44ec2. 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/USDHM1718023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003bd6ff635cedeec89239f2ba04ecb6b861cad11695df667b17c74455cd430f. 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/USDHM1718025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4634e3a4ec9c15d63f635ea9569f30decf920366ee6f998d5eaa80add03bd66. 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/USDHM1718026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329858af18c300c621b367bed6e16f2d05e994cc3e7d0d5e5dc9c3511887e077. 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/USDHM1718027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56315071509725dd66abca6b2afee5cc0254f29628e0de2e4928f2d0c336e33. 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/USDHM1718028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6109457a0606ef8c34c03fe880ab253681b88a116fd680a9abd0baf00ce24cc5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDHM1718031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830617d16e9a2b92e2d7f56bb5fc2c77c586a5c9fb269990defd2f9b18de61a7. 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/USDHM1718024.
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 0x5153ab3e2130e69256f05aaf235b646c05c587db4601d8f99d3162fc10101b3b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USDHM1718029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ff131eaefa1ed9739de56a548b7081d791b9413cb9b4f275112ba3eb1ae545. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/USJ3V1451735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa724c17bfdb08a13d05e6602bae4088a15f2f406a775435247f0059116fac7e3. 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/USJ3V1451737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15297754f1342eddde4586b946f11aad83e5710ce8c3f3cc3cf9c143ccbf89. 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/USJ3V1451738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eb95821b2605580dff045c647a498bca6dcc386ea886d1a1fde731a333b1e7. 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/USJ3V1451739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b71276ed6129fd48b62279d7582b23ab500cfbe0e3b94f1ad05329547f084b. 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/USJ3V1451741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb607c02d6106d82a4c85bd958ece27c74ccc7e631c6e9c9bed0dab0579e55256. 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/USJ3V1451743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3c5151045723f78e53ebf771179d046a9c1bfcb1a479b571bb80991de7a2b3. 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/USJ3V1451744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7496082166c8e8d51c554018aeba4d8f24136d0f14bb52c826e8d87866c4bf2. 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/USJ3V1451745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bb77c158ecbead236f6d16347a907ad0cd17089e7d6e01cc731c25bf9095fb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USJ3V1451742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b789ffb0a013373ad6372c747fdf02a0ef0db9a7cc45d5b7f79af3fb7b598f. 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/QZTBA2376752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaeeb31e00a0474b734e0c151fdc8a1799f9c345cc93adb72de65fe5fc519211. 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/QZFZ42054471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb94ee0185f3a01e6d73b3cfc797e4b3a73d2f2699ede91a6d71274edf0d6fef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:51:06Z), 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/USDHM2006526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160f04256fa8755888eeed50ccb64088c5a1c1484b6da0a23cda93cd5033aba7. 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/USJ3V1462062.