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 0x05c3f6f3bcae64d5cb02f86859d73aca0104dccb4eecf1012d64a9e751252adb. 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/80752735-78d3-46a6-b64f-16edda184c5e.json and https://artists.proofprofile.net/proofs/artist/80752735-78d3-46a6-b64f-16edda184c5e.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 0xffe527029216668a5591509b5efedb96d3d1ba157e3fa7dafb1c65126abaec94. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/RUUM72100243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309e139e731fbeff409fc9b9ba4c32f91ecfa1e5049a3cd341a416c64128fda9. 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/RUUM72100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad59cc651343b0042071788e5db640365680604912ce6e099dc9b3c6c2b1f24. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/RUUM72100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083bedcae790283783aa16e1c01fc4351c5b81c0d1973f911b1e75bc9bcbf234. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/RUUM72100247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1674a877985f96bd7eee56a92851bba7d18e68b8e747bba2e6cf72d93dd0cb8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/RUUM72100248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e453f2bdc0e09d92eb74fb18538b7243ef926a4c1e7312403b189e2e601916a. 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/RUUM72100249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c899d85d15ac44be54c90437ee50183f4a737e6fd77ae636b2565280218a43. 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/RUUM72100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3673230552a567c2af968cae2c9710652de3f02f471f559a4893bdfa69dcd432. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/RUUM72100251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1cfaaa9f79f9170975f9560254c82e2903dee9e80b65ef28a28f6cfef8b118. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/RUUM72100246.
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 0x7fcb1c6b7c99eb115fb498b5d6eb40dd67cb32250635c56459a6323aa9cdcaf3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82476155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56803ab64e0f0e8e3c7e6256a7114262d9de8dd370a2c622e19ea60d1b6f1e7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82476156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc29fea822a3136ec0efc4a196bdc48aa8de40c25f214ed290634a3df0403a09. 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/FR6V82476157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2951e299fc4d7b660b6cc990a411a3e5ed2e128252904ae3129f2f0df777e. 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/FR6V82476158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a8862741638ed5b30ff33ae1500aaad6f76834d2c703e258b619ae4f12314. 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/FR6V82476159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d49198cae764cfaa3f3356938b9c227305b6e3f5828376665dad62c9ed43099. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82476160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dba76ad3ebf5c70ffe5506b525f9d7044335a7729a7e6375c31ee2c5b443dc5. 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/FR6V82476161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737c3e4713737e2254d66e7e4f894d3a16b563921c7bb081db193f305402501e. 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/FR6V82476162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78508305a9da8dbe7fcc550de4836c3490cb22bd84ec2a41a808f1f0f3d41e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR6V82476163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693fe4e17665f2a9a8916c949ecb0e746a8f3213d5ada1192611ec08e0ed0e8d. 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/FR6V82476164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c95ec29aafa9a54ebbff65670c886767dd4dc5b22b6fa9c3b31666e1619ba. 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/RUA1D2465061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ce7f4052d4d1f90e3ef5d63da0db61c4d7c5acc369dbdf39da0b19b4cfbb93. 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/RUA1D2467114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9dcc508d3de617c67c67066f4e77ca46a5c7a055b59b11d9b95bb0e8739ca6. 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/RUA1D2458199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6f76b80d274f02af0e706df2ed55ff4b42bd7431cfa6bcd5087e8319c4a33c. 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/RUAGT2338814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f24ab2bb9eed7b8ffeca34f18899c3a96c84dd6a1c7e86b286540a1d78f27. 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/RUA1D2278036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f436b0a9269cb4aa9cbbdbaa3eb3c390370c1942901f1b64d407f4183d20478. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/RUA1D2278035.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3209a5b75785118378de2113b43cda0c6404ab6c7011b95809f2c0831b37f60e. 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/USHM91447859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf735149b5065a332cba9ee52f4093085e4df699a7e8203f676c49297658d6167. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USHM91447860.