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 0xb02bff275ebd904599f26922cc19c05bf129eab3bd2aac531e5158fb6072a5f3. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6d3d209-290c-4dec-8355-3b85d7a39fa0.json and https://artists.proofprofile.net/proofs/artist/c6d3d209-290c-4dec-8355-3b85d7a39fa0.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 0xa5c0d963522cc6d7fedf7964b3e6dd1afb69cb823287d5c11cdd572d8860aa33. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G2411296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf3406301d9d42d4114a25a288320b90af58e871f03d1d90d13e78acc569227. 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/ES71G2411301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59a65074fa4f3385c872f97015a23c97b6502b158d5f4fb9f67f73fd5615bd. 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/ES71G2411305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2827348b2c4edd3cd82ec53eb50cac756353c0640e1ce857d7210765419edb. 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/ES71G2411311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1ea589908194b5d118184670d1c1a241e1289c5d3df17213f1b6680d6798e. 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/ES71G2411314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4656a8bb42a2edb554ca33e347a2923d035f635029e1a0492b3874155a089ab6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES71G2411306.
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 0x4493092ab8c1e8524de374b97b348aed84f95b4507d44e3e106d424a0123385f. 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/ES71G2411315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a53b10071dbcfbbc9dbcdba5a3f61f96dd991906de19549ef6c63ea9860435. 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/GX3Q92095419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d9b09d198d7d701ec494ebd7dffb24d556e6a0105b9dbdc2cb28eacf48e057. 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/GX3Q92094006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e980c49294d9c86652edd204689d05d41c5ec320483d867a65d43bc6e8484. 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/QZNJY2283839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c284b67bd354e1ea066e3b65a6314167e3aa1b132492a31641a014de6ceb0. 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/QZNJY2283840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f058e88abcadda2859a6522cf385dc502869f9e637711d92ce063e8850b291. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:54:34Z), 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/QZHZ62259653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9e191f616d4fb5e72b678b106b75925c42271289fcdb4a35fa7b64cd80915. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJY2283842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f622c6faf4dc6a658e08cd8a4e2d287a8be2b23642441711c08cc2da9a83ca8. 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/QZNJY2283844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf710afd921775ad7ee3244b012e956a52c3b2dd317461f80d73e173754d3c529. 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/QZNJY2283846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2146dddcf5996dcc35f33fe07e2cda9f5ada3528ad1890d664ec0529037821ba. 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/ES6102400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8edb159dfea0685cb223da5bf4473100f75b29e1fef6d70f1aa36de77f53c47. 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/ES6102400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8da5fa6e413588f3f4cb2d19c0cb6caa2bbb20dcc0c03c03e630fd65deecab. 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/ES6102400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce499ad0e57a0830cae0705701d4bcc4edbd964d94230b0fc39fc50cd6a2261d. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/ES6102400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415bfd68f24d0006243809b9ec92f7500489bb323425235ddf14a3971b4ceb48. 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/ES65A2300027.