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 0x66f280cc1721f151fe50048dc7b3aa9036b7f1690804360f4707abef21b72d67. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48986329-743b-4731-9dc9-d7b0679081b8.json and https://artists.proofprofile.net/proofs/artist/48986329-743b-4731-9dc9-d7b0679081b8.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 0x53702d82f904e5b3dc4eb629e915234b7636afd679a601874cb96417d64436bc. 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/USY251509090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c321d13521d6962ae95984b4d71e15e52ef2f737f5b9ff8001f43622ccad04. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USY251509091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa452713f11a8d9ee63b79efa8a09b9213e6f95c5f262a78a3e423104dc5e3539. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USY251509092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21982de5fe93a47185630ee659c374eda666be71f3fa2f4574fb35e3f34b79e9. 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/USY251509093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12caef50950373909e3c404e29c697539b71ebf7076b0346c56e6803a7039756. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USY251509094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb615cf7a26f90754c726329525bfc53c12eab0e52f0ba9e846d70861c127af06. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USY251509096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a6b86224bc5ec02ef421eeaaf3ef97951f26496d286722e352525dc2bd0a5d. 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/USY251509097.
Excruciating Malformations of Abhorrent Descent.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bbc3ef28c6619bdf82931f96a3bed7b362d8f65d8359ff06181ec49f5ea60d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/AUQHK2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf63c19a2b7d363496c9c9b5c5289dd253ff9a9c2397195c02d48b2997441f1a. 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/AUQHK2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e65d57a56b4423f128bd45afba99290318bc24bc028829223fdaa479ba58c4. 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/AUQHK2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e51768567ec9c382454497ea6652c045c8ebf99c3e733513a3ffd907f1c4191. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/AUQHK2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bbc3ef28c6619bdf82931f96a3bed7b362d8f65d8359ff06181ec49f5ea60d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/AUQHK2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d61cd5a188475e68384c6c4bbc402c35deb943799542bda5c887d2d88b706. 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/TCABR1318167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38dc433f3c623b61ff74bf50bcdbb89ea39e78ac7c82ea2668aed9abee2e8b7. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZK6L2031192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e59ed0ae703d8136ea0fd044e212139d2f3016e0ef4485b4c91d848332076d5. 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/QZK6L2031193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac46e79147de940d9d44c1f833a5b369f7e48a2ff8d782812467ac142fdfc6b4. 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/QZK6L2031195.