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 0xf87397b7eb093a8d72db52ba5e138b5ca254d0d93eea7b7a4e57947fde0a4113. Chain 2 (Bitcoin): anchored in block 953871 (2026-06-16T01:46:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0740a392-3abe-4c04-8a66-95c3ba7af9af.json and https://artists.proofprofile.net/proofs/artist/0740a392-3abe-4c04-8a66-95c3ba7af9af.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 0x97705cc4f35914e5b9e0df135c9dfb46440e89eec45063bb6489f0dfab3ff322. 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/CA7911900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e23feae445a819ccaeccc719ead6e84263dceeb0d83fe8167e6920220ba159. 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/CA7911900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d6e62370d36113a9e6eb39029b6587ca875ebc2ba8cb78b6fe73b9d9724e41. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USC4R2109047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f9d94db16c2d8f1ab9e6f61f61a5382db59c8018e09718d416b92acb745c3a. 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/USC4R2109048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457b1fbe34707d9f5959d503d6226feb1faafc7a773ad3d1d238716eca20c12d. 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/USC4R2109050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a274cb585b4b43c1199c6975e23b5a5f2e0d4c94dfdd23d2856c9877f4075f7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USC4R2109054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c22bc622c403d570fa90cc3c040c578972c3a52236ca0659568b94c2b80f42. 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/USC4R2109055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8159582632cf9886125af8a26ea94c6a31d17d0528968e54f10d48e9ccfd882a. 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/USC4R2109059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab3604d72ec79e12ea742161023f630e61f2d62abe4c3258a7f4f1cc73750e. 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/CA72N2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef0c4c834c8d21501655f26e81ac7b1091128b49f0dee46f61b698a13618568. 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/CA72N2000008.
A Tennessee Whisky and a Newfoundland Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33733b3b03dd19ea4f02ec9860b6379ac3b4a4aa0de86b79971b9ccbe94cafd. 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/CA72N2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab3604d72ec79e12ea742161023f630e61f2d62abe4c3258a7f4f1cc73750e. 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/CA72N2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479ab89ad56bb5c3559e90fd69b0f817c1ef67e6340f66163191051e812440a3. 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/CACIR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d672ce72b1aed5bbf7edc0080abbfef20926d528356f18343d608a8b21f0f. 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/CACIR2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479ab89ad56bb5c3559e90fd69b0f817c1ef67e6340f66163191051e812440a3. 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/CACIR2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d672ce72b1aed5bbf7edc0080abbfef20926d528356f18343d608a8b21f0f. 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/CACIR2100003.