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 0x352d7d2dff3f9a3552c6bd0e18dda6708b40c40923ec37eaa77f758948e96b00. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db60663a-dabe-41e3-83da-12e3279d1d7f.json and https://artists.proofprofile.net/proofs/artist/db60663a-dabe-41e3-83da-12e3279d1d7f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x9ef5fc848f7b4ea29097c7d7ba64a6f80416d32bab4de4451610e85e1e2978ef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109401 — a six-check JSON result.
Alexander's Feast: Part One, "Happy, happy, happy pair!" (Air & Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fa0e71f737c2cc453a841a3efb3799194804ed384895278e4b99e85d99b974. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109403 — a six-check JSON result.
Alexander's Feast: Part One, "The song began from Jove" (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a1e2e0360bc23e3217bf8819c380f0952334d559ed516a2760cae24f9e8b80. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109405 — a six-check JSON result.
Alexander's Feast: Part One, "The list'ning crowd admire the lofty sound" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0b0fdf30ec77fd7d8c7508d3f9afe068a0a39eae92459d72a656616c339b02. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109406 — a six-check JSON result.
Alexander's Feast: Part One, "The praise of Bacchus" (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd059363a06abb0c17ca8f98bc2f8ca98e0bc298194be1368ef5375baab2737. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109408 — a six-check JSON result.
Alexander's Feast: Part One, "Bacchus, ever fair and young" (Air & Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc00b4ce12f7b83c677f39bb85336c3ad4c65b9b236481e46f1ffe1ece62e69. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109409 — a six-check JSON result.
Alexander's Feast: Part One, "Sooth'd with the sound, the king grew vain" (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8bda7c86ee2c7e020900dfe494970c93481f4214e3250a087238e63fa3489b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109410 — a six-check JSON result.
Alexander's Feast: Part One, "With downcast looks the joyless victor sate" (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0f3fc2e97d5111598af541b57841ac7f8a328dea1e7e1ebcf266a3dcc3e208. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109413 — a six-check JSON result.
Alexander's Feast: Part One, "Behold Darius great and good" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb07992b7acf0286a4a44b1dab111f8dd9e136fb98a020622c8a1404757d98c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109414 — a six-check JSON result.
Alexander's Feast: Part One, "Softly sweet in Lydian measures" (Arioso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4659ce516170be10014a0383f55e5ac8b5a574c548e625503695b5bf9e665c1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109416 — a six-check JSON result.
Alexander's Feast: Part One, "War, he sung, is toil and trouble" (Air)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8486ad8b6e3079784082e6520cb42d16bdbf062ed07b41c929d9d65fb538e6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109417 — a six-check JSON result.
Alexander's Feast: Part One, "The many rend the skies with loud applause" (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82827ab368de5bb243fbde33f53954570d7c9ae4dfd951f701a82b7a27c7fc6e. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109418 — a six-check JSON result.
Alexander's Feast: Part Two, "Now strike the golden Lyre again" (Recitative & Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8214415f9bcc54bfcbccdb88369d17de2cc8b824bc7cfeee338893e4ae6437ab. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1109420 — a six-check JSON result.