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 0xfeaf89fb703e66f3ced33d19fa476fc376a9d102365ebde50e06c869ec91b123. 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/e5f53e40-ee38-4326-bc20-246b8697fd01.json and https://artists.proofprofile.net/proofs/artist/e5f53e40-ee38-4326-bc20-246b8697fd01.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 0xdc2ddac71d05d6a015ea2b3e901a939d558b981b5db5f3d43c37a33d5c33caef. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US8LZ1000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01843f090a14f5d13a3b48d8dde8482d9006a4be105c0bbab6e1ffc28e1ca377. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US8LZ1000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1edcdc2ff2355f48fd9716d53b2e99735954d220e367c823a1959771514cd4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US8LZ1000004.
O Come, All Ye FaithFul (Adeste Fideles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf970d056f5d83f26343012ac87c2ea25a8947b8e4403838931ec968cd17d7702. 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/US8LZ1000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d94fd52130fbb02e1a48e385799ca481b99956e0cde85fe3a4a28303728d8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US8LZ1000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd56eae0a085d38b6ae82e532a1577ac8d29b55a6962fb70713915e83da047f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/US8LZ1000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0464627e3da7ad347dcabe32f08f91eb0f1acb9127aac5bc3a1b768da0dbeb9f. 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/US8LZ1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe056109400cab9ecf8a5ff96c03adc0357251d7a6202cedd5676bd51dd80c294. 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/US8LZ1100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12de2d63fe6f541414fec4da4641e39cf2793f500ca708cd0a96be012e4ab2b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/US8LZ1100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870646d8b1bb890e26ab9aebbac12588dff2dd1d69630f67cefb2f560ac857c6. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/US8LZ1100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74c3174ed9323632d3abd84017327898a0663a97db59e50fa8e95629cc00efe. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US8LZ1100019.
Popular Classical Guitar, Vol. 3: Renaissance, Baroque, Romantic, Contemporary
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd837f1a5fa76ecd55814ad43fcfc7456cdc2a922fab3c5fa546811c6cea0e. 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/US8LZ1500011.
Adore: Classical and Romantic World Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba912f2f8310b06c05b38be17fbabdd760665b3f8de06a7619acb1afe7ea309. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/US8LZ1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3725d9d2c4072b2038760cf3e6d923d085e80506f7e347ea7280b2a1affa1e5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US8LZ1600002.
Profundo: Romantic Music for the Spanish Classical Guitar
2 Thème Variées and 12 Menuets, Op. 11: No. 1, Menuet in G Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56482a5a67eab176cf5d072f6440915636e2f0ff3b3a24adb0acb8505c3bd3f0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US8LZ1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde4a03bf0c3c9d215d5404f326c231878d45ee803e803639632d93087f78fc9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US8LZ1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2918e88eabc419a6b524da9a0e176a412a2c1970b4bec8754f6aec059ae4832. 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/US8LZ1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf094fd8f878f6e3f9d30223e1b7f992a4d7c716862271463f56637c426faa72f. 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/US8LZ1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef06683b2e6d556c7556397e9b9b3520af1287c69b7058be80f35eb03c28ce78. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/US8LZ1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3befb68e2d964259d1527f56f3e62085abbd2efb5835b7facdadec552302cae7. 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/US8LZ1800007.
Art of Acoustic: Soft Instrumental Covers & Classical Guitar
Air on the G String, (Orchestral Suite No. 3 in D Major, BWV 1068)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27637f2664dcd4977629aaa3dbb356c0b45f154b4e739ea3afd9dc2536443de5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/US8LZ1800010.
The Long and Winding Road (Instrumental)
Every Little Thing She Does Is Magic (Instrumental)
While My Guitar Gently Weeps (Instrumental)
You've Got To Hide Your Love Away (Instrumental)
Yesterday: The Beatles Instrumental Classical Guitar Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d329a93b9f1ce5791ee93f2b62b73f844338e7b586888876960dec3df9b16b5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US8LZ2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b2ba3253c57b25c53b4f6a9b9eb206c79c5e7711b7b6880a5cf456fd46c6d9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US8LZ2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b59ec28367d286630381018fe637009269624d49a32595a9958fe29b5b500a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/US8LZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fcbf8985f851daafa46732bd920319dc6da39654030ca2c3c980845a160735. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US8LZ2300002.