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 0x5e5bcbd2cdeb2ce07c81c9d15deb3c9eaf8f7492d73a7d08f23f69248767b3e7. 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/aca45d09-1dc3-4f41-bc1e-89ac6d9b83ba.json and https://artists.proofprofile.net/proofs/artist/aca45d09-1dc3-4f41-bc1e-89ac6d9b83ba.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 0x8f220aa0358807a198b6dd55a3ba0f093e3bed4cdb30f9859dc3238122e82fcd. 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/BEW160912506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83bc2cd40458929c29386f9a29b7fd6b5ae08e9c05be4cb583974319e47c9be. 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/BEW160912507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08512dde94051cd34bf12a96c1e7b3356191de3b42cd678334ad648fb7473888. 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/BEW160912509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2898ed1906e1c2fe4dcc85e5b4fc9f87c811a62a2e053fcdae0db8caf1b74be9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BEW161213502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a13b37cbbe624d7a1e898a49fb2aa5c3a321e392f883a2f6473229fbf6976c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BEW161213504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf56f6ce6f4739214fce78c084256aeae9dea058634620ac0502b63a92fbf8e0. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/BEW161213505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8b1ac03a21141ac49865e398abbb357208249719344ad1a8a8d43c2376ebc3. 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/BEW161213506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686bf15838f277982a1d17e44d01b1a1d892a5b7e67776cfa065acb352eef25. 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/BEW161514801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf904d48b91aa496213f96aa5e901f8eb35919b8a529e35cdbc38c6b5208238aa. 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/BEW161715606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9430fe55d2c88fb254d81f6428eea8e46a48f6765a6671f887ed5136f86ecb69. 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/BEW161916101.
Do You Want Me to Do to You What I Want You to Do to Me Too, Do You?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935711e411a43c235a5ac6f598089079d7f52d88268845fff43e242d4895f03f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLC242100372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201c3b30ff23e94a03edf230a92bd33e2d42919655a97a7ea3ff4de96c81398f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLC242100383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8388d1bebbd8df6e07d926bd8b63c8e0ef4676d16d81894a924e529e7f581c. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/NLC242100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a428a6f2b5d1849a6dfc7e621bf99d96da7b562e5d4d03dd2aaa7728a2b6b7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLC242100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dab8b318543136fd85e1a5ad5d034cc9bda8f04a6d6fa4616019986bbdc0e7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLC242100742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0dd21984dcc6e1716a15ad78917f3269360fc7ae9d83bcc49c33a0361282ed. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLC242100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046adeca0cf64868f045369e7c4aefb815a966569da91d1c07ecf3016b67d43a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLC242100744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648bf334e697a018ff93dbb578915f20401aaa93c1cd716256f0f811f1139c0f. 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/BEA032200155.