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 0x07058b69288477bffa5de8d928086dd82de5c941865040a2df54bcb013aa7c6d. 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/bf29d1e7-1d8a-4705-b2bd-622b54fdfecb.json and https://artists.proofprofile.net/proofs/artist/bf29d1e7-1d8a-4705-b2bd-622b54fdfecb.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 0x8f7afc1fe067ae3268f22e8ca0f01a75d51df8a7d2dc15d3c30cd4d0984d044f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USDBB0992179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacad61dacd1278a248c555204e1dbc3bcf829480f84e2564d96386891ed28fef. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/US78T0507191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c985c6b9807e5ed79481012e473f2056cffed5f65b6337579519156921bf0. 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/USDBB0600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb78b5f5fb275500d40d481820f8d0e0db3d8d415d869f3d7a5d1c293dda0c0. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USDBB0603114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc18d9300801d79984116c10f2e937ab6c64220b837b7e11afaef42105e0e18. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USDBB0607097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ddda599a7cd9778233067e24bcb141896d3d714808f66fa1c7aa5b3697b51c. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USDBB0605080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1288665f98b5a2b0f95aa92960f13351e3c790c2a562554340e9f31607ba26b8. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USDBB0600875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0267c49442634ec731ee451ac67501f7d97312eb310c3eafd1e203c658e6e0b5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDBB0605866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea59b6ae561a80a17c647dc5465486c9695db95ae1e286e27af6b66d43caba. 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/USDBB0606438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb1b4103e44cc27da354a8c085b85fcbb6cf4bb07f1757c2567d172c1b923e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDBB0605612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c985c6b9807e5ed79481012e473f2056cffed5f65b6337579519156921bf0. 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/USDBB0600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7aa83c03fff4186ca0fe33338f2eb716ca8be7fee4cf8878d8258cfe3d8ec0. 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/USDBB0600300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f430bcdd90628335aaa1cc9a37193a6971f67cde0a6ddc9bebde5fe8fcd5f32. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USDBY1000056.
Jerry Masucci Presents: Super Salsa Singers, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c985c6b9807e5ed79481012e473f2056cffed5f65b6337579519156921bf0. 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/USDBB0600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea59b6ae561a80a17c647dc5465486c9695db95ae1e286e27af6b66d43caba. 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/USDBB0606438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c985c6b9807e5ed79481012e473f2056cffed5f65b6337579519156921bf0. 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/USDBB0600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4d18bdb20f6199a20376551f81c1bf71171829f582fe8c345231d4c4d07feb. 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/USDBB0900839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d135b8cb24bfdc25ccc39fac7ee0a2cc85bec2ace50458fffb4c371b57a79a4. 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/USDBB0900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4c985c6b9807e5ed79481012e473f2056cffed5f65b6337579519156921bf0. 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/USDBB0600989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb78b5f5fb275500d40d481820f8d0e0db3d8d415d869f3d7a5d1c293dda0c0. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USDBB0603114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d135b8cb24bfdc25ccc39fac7ee0a2cc85bec2ace50458fffb4c371b57a79a4. 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/USDBB0900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0267c49442634ec731ee451ac67501f7d97312eb310c3eafd1e203c658e6e0b5. 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/USDBB0605866.