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 0x94e8253056086201ac146dcdd56262c7161118616cebcbc462fc4d9dd32179b6. 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/8fcc0510-ab39-48cf-bf1b-47b6989c1134.json and https://artists.proofprofile.net/proofs/artist/8fcc0510-ab39-48cf-bf1b-47b6989c1134.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 0x74b45b91e75c84e28bfbf14131cc516ac5626ae745ed642e47a8e4316b31770b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL1LE1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad3db3fd95b5832301d010903e5cb67769527ee7b00578410fb4cb54f5055a. 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/NLL6R2000095.
The World We Were Born In No Longer Exists
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bd8e9024d7d06cb12a7d87ee3e1f6d73404396dc25777dfb21eaeecb8306a4. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/NL1LE2102288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bc1aa1df6b3227e6c4c9468c973d10e51347f83e07e954480fe44045993a00. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL1LE2102289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111b206c89c625c9095b48c0c7c887f2b8e01fc8e58c080feac99e61544155bc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/NL1LE2102292.
The World We Were Born In No Longer Exists (Penguin Prison Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48558f6505f3ed8abb2a6aa03006112ca781a2180a60dd11c5f894bc3f6b23ad. 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/NL1LE2102297.
Objects With Intent (Heathered Pearls Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6590e8ab510f531203a10864d2fd8e6aa9201248b9bbe4868bf960a34e7a78cf. 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/NL1LE2102298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1310788e05f9a81fa7878a087d1fd308148a7187d3d3bac1522325b7167ded2. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USLZJ2236477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0204795469bc703b8c35f8a9cb46f6c844868aebcbf87c081a6da8074142024. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USLZJ2236610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21b6bf92fc05a08ce433c6a35702a27daeb6b33de16fc6682a936521f0df5b3. 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/US3DF2275638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd36f4d565dfe2b4a6fe321dea221d30f3a230a441226fc4b57ba7dc02767d. 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/NL1LE2302890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c6a2d3872c493173ca91fe85f16612edeb0b6e7cdd43260618e69623b133f9. 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/NL1LE2403583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f632b6c720fcc58627ac2bd7dd7f5d1493fa1e62a318826fc1cc148bc15dc4e. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/US3DF2526681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e40041574c3059f3a823c4647b62d6f81215fcdbd0cf35bd4bda1b672b0d3f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL1LE2303442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd36f4d565dfe2b4a6fe321dea221d30f3a230a441226fc4b57ba7dc02767d. 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/NL1LE2302890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb810a35684f11dcb53b12e61d5803072012fb19205a5f5cae6ecd6bd70f1dd. 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/CH7812224888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79ca5ddf160912d1430c81a82c8fbcc487a3bdb9d27039be99b972b65f7b807. 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/NL1LE2202602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b5b37d36720af59bf5b86cc6e566000997c7dad76f84b4f1a7e6d7711f66b5. 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/NL1LE2403522.