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 0xcc083d8e7b91a79b1e6bec8bb194af3c217c34cc91942fad654a3fbaea82fab4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/872db172-e52d-4782-aa4b-1f87e9e2be90.json and https://artists.proofprofile.net/proofs/artist/872db172-e52d-4782-aa4b-1f87e9e2be90.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 0xc94d310c53ef6244ff02526de170514f63f6b3959a69aa46af4084ef142d7e92. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UST8K1820602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd458d3485b2009b066dbe537734bdbb4e5d7bb815ab518e8b32baa20290d855. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ZAA6R2000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54c074fe787d621707fda80647520e8f3d0cbbfc62759d7e43fda52fb8493bf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZAKB2104636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12664b6e8dc879bf75e424b5c5064e3a4ad9a5fe03865ac6b7f663f96582e642. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNMU2322000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9844a257fe98ebeef7fe53559b1003dfde0cb915b4d7cf7889d14fa3e1cfbd16. 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/QMFME2354478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a96fa045590996bde80aaaea25c1a288237a4e5a456b5fd2403c4c3d40e08cb. 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/QM7282428916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b9b03ef3254cfd6234c143a18f2640c5e0041ae02de18fd8a5c33c7523e91d. 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/QM7282428917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5adf156094484c5f0da32c905870d186a337116d7d510a107a5b7b95887d91. 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/QM7282428920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cd1e428726fe70ba581cdfbcbbf4432f968da7fceb388398cb55316023306e. 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/QM4TW2480702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9844a257fe98ebeef7fe53559b1003dfde0cb915b4d7cf7889d14fa3e1cfbd16. 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/QMFME2354478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4007277e2a5dacba8e0d179130b9f655d1f726fff9d3ef60dd2680f0af52bdf8. 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/QM7282428918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895f35d7df826c7db6fd1c8226023183c81780d1c501d05f4b3308e92b928b6b. 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/QM7282428919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5025b228606476629f424ae87c124d2ca4172798fdce86e185055376e277273. 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/QZFZ61941684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac7b867fd7501d8b0bf609e13027ddec691cd1d67c2c89d14c6855214a7b1e4. 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/USA2P2250955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0d4f62a6aaa58d4866e91374f9c707f1fcd5d17b868895b529f223d306bcb. 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/NLRD51968567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3f791cd53372aefdd9dae6145d44a42e9823263ac9623dcfc61dfdd919283. 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/QMTND2000138.