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 0x4260563938a8d9d3731085234fdeb8cce1bffb2b1099b74edeade2e7a585e8bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7bf3d0b-34a7-4a7e-acec-661c3413896e.json and https://artists.proofprofile.net/proofs/artist/a7bf3d0b-34a7-4a7e-acec-661c3413896e.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 0xefb1a9617dc2c38fb815fd10d5b8fc9b7cc7691aae2cc323bc083d1b746d016a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLFP1604830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986aca60d1cbdaae234197b92d012e3c82d5c6432a2afbad169ee1d92ca3fa3c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLFP1604832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb141f87d8520f25672351a6a4dc8bb3e12380b24009ca7718bdf470faa9f4dea. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBLFP1604833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdbf87d5e1197b1760e48f637d9a8855b5b522dd7c6cf705c2b8ae50bb80cb2. 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/GBLFP1604835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c71e112654b8bc20a27a84fea6ce9becaf6e1ffa220294942582e3b6e6a987. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLFP1604839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98347e3b38270a3cf80721b16ac0f0a9506b778f030921894c5714b4deae1a35. 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/GBLFP1604840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2d1a1c3e3d273883429f399b43da12dcbeab2e57de202ff17247ce4b5decfd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP1604842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373a20235b0b15b1c70cd0e7b85b8085e637985a30c535f285098c0f374315aa. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:17Z), 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/GBLFP1604843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630361b227e5191909e72fe5c77969c7bed2310a1b1c5d81caa5e4b63025c1bd. 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/GBLFP1604849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f886c574f6e442d2555d45f3ef0a6c9b4dff73bc4a5bf5797b2d0b45c639aee. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GBLFP1603463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e3cf19c05e26913d4ac5f216756851bfd4e5aeecca188cd1e265c0f33420a5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP1603464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf776ab371f3ab468ba2fb44fe30ce526dcb963c6b7c82d235b5107cff00b87e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:28:33Z), 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/GBLFP1603465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2dc6f39c759889fba941a40567c0808c9ea67a7bb24f0e1a02756e20b8cd2e. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GBLFP1603466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b91301022e75c408f9964754ae117b3a5669d283a2ad2adc01d87c63867d4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLFP1603467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e933cad40f912cac98a59edb81a3425a521fa474664c5ba39acffe46a3cfdeb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBLFP1603469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce48afa49d902f7f63e9cb068a3c7fc410b420cae41712e6e03eecdf68314dc0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:07:58Z), 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/GBLFP1605394.
Classic Tracks: The Saxophone Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420f38d45ae9d2c2e0cfc8944794cf9917f7f630b36e5bcfb450b06b7384d04e. 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/GBLFP1616739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72d8be13b527bd77d9f478250f95fc09a791d00e5391b879248b140e06a34f7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:22:55Z), 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/GBLFP1616737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcabe302e45a2b46f61565b751d1d0755073f6b2530f5092170524dcea990de1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLFP1616735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbc276481877e1fd708b372e158e58fa693864bc6838b385f9ac375ccef4e01. 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/GBLFP1616725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6185b37f6c6eb12dfa4a983a008648cd38241422f188927ec34c80b2fbca95. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBLFP1616734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeb17101e57c2c7c349697831b1b13d2d2afb40545811e1c840c4ae38147a4b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/GBLFP1616723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f307ddc4dd8226c04a54a0121b8351f49c9b637644525f5e7d3f69dbc7f2bf6. 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/GBLFP1616733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac03d0c53c084ce721042950b774d79af755a0cd75d2bd09a1b638833d3191bb. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:38:05Z), 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/GBLFP1616727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f4f31003539544375239228d8d1ac2e6ff9bc1ea331ce42ffe2657b4dc92f9. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBLFP1616721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cbdf9eab94d3e5bc164d96b2ba7fbf0214ef4d05487e26c2873dad8f900435. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBLFP1616729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a290422cd0306fbd9380878eea4dea0fd87cc0758574a577a49a097402ee16a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CAWHO2023068.