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 0x2bf94fa7eacee2355a6a699934001919a54f71aed690336e1cb491e29a4a1308. 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/6983bbe0-7422-45ae-b793-aeb6466c51f5.json and https://artists.proofprofile.net/proofs/artist/6983bbe0-7422-45ae-b793-aeb6466c51f5.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 0x7d046fcd317f0f389ab68b46ec5dbaa89f6475cd9be13f8140821ba5436fc8e6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGJ1239503.
On the Voice of Guitar, Vol. 1 (The Backing Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6151a9382d9b99ef9129001b8da1508f42d05650113d82bb848e1b84fd7fefd1. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USHM81229760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d05e546be803912ef2d2fbf07c101d19c52f90234ac4883c64e1d83be62e6b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USHM81229764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e0008192ee0376c203eb87cdec3a8ead9ce73334cedbfe912eb9581466d0a2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USCGJ1360664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a21babd51cf77b4fc622ccdc1a4e9dc305b9af83d5e4c5db26c34450f281f4c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USCGJ1360672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2787153f3d3e4395c4c6688122aa67ac1696ac73eab29a27397e540a4dca86. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USCGJ1360673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe323ac28cf6d7703fdc987e29a1f50f0d53680f805f78d54390449ae4ffe9967. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USCGJ1360674.
On the Voice of Guitar, Vol. II (The Backing Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382dd24b8968148ea97e5ee87b9f61281a5a754c85474e6e901e84bff3a86b24. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH1786157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa435722970b2cdb12e44e8bd28fc7371196f8db14327261d8e8729fa517530d5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USDY41739145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbf8d0596f1c9696dbb458f2ae467f778d9cddd3d47cc4a203bbaa812578581. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USDY41739152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cafd985e40f0e2e51d184030ec9f6c82e1c41da6d87ca97023473278c97c2b0. 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/USDY41770970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033255dc72884639420c0b1798346acba59544c53044fb63e6ef2b99a9f467ad. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM81704428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaccbb4a40b4438b46e4f95377a4e6f459dc010788eb14dea5b78680372798e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNC2186168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa6a3f16735bbdd91cd3d7397cd0bce4de2b1b8b3c86fd41d6271dace752487. 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/QZHNC2186169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e401eb27801f8b0105f96997ae1aebf0091b2281abdff42f7cdfdb206210d7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNC2186174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba343826d332c1ab7a6128b63f7423acdd9fc3e4f9c4d1f05dd216c8b804a88e. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/QZHNC2186175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eba33f0c1328aca0bf9482e7ea532d4559d666663fa4d3c0cff39467848ec9. 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/USL4R2172781.
You Can't Always Get What You Want (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6167dcb84cb9493eea74a529a6c73fffbf666a7c0f642140d19383c4b9ebe75d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USCGJ2462636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa613c1938dc185effd354a9aa1386ad0c2706d0bbe5d611b56bb0d1fd0b5fca. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ2462642.
Circling Around the Wheel (The Acoustic Collection)