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 0x3d8e801ffbbcd1bbe489fb7576e8456904265a578437ea77d718f8a84358f923. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f494cce6-a914-4cf8-8eb7-f6046ee66340.json and https://artists.proofprofile.net/proofs/artist/f494cce6-a914-4cf8-8eb7-f6046ee66340.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Early 17th Century Dances from Terpsichore: Galliarde (1)
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 0x04874f6b6c1f1c9cec9f5a0a25e724312f8c617a7afa0fdd0411bf382f002a3d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USNO10200954.
Early 17th Century Dances from Terpsichore: Three Voltas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640989782513ec0630e8af5114d966388c4eed587a9fde084dcf92dcb0e7e790. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USNO10200955.
Early 17th Century Dances from Terpsichore: Ballet Des Anglois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007d4a035eeb90dc270eb62092b6945d41effa2da784af67191d27033825bd0b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO10200958.
Early 17th Century Dances from Terpsichore: Bransle De La Royne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fd46af6810c87a98330918fe3e8323d348b1b0ab3acc1f0ad291657f5eaf70. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USNO10200959.
La Spagna: Francisco De La Torre (1483-1504)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27b5506ca4f7ec6d46aee0e59556574f60118e8932fea617dcf66e0a880ec45. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO10200962.
La Spagna: Guglielmo Ebreo Da Pesaro (c.1425-1480?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138f4c9dbee81eec3be2a5552815893008b4851c54efaf6b4deda7960a64ed3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USNO10200963.
La Spagna: Heinrich Isaac (c. 1450?-1517)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12767f5fca724de41786eec04f59054764bf439b9dd77bd5d69ebe8265166f98. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO10200964.
Sixteenth Century French Dances: Two Galliardes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efa571fc9c39543a1aa912b4373ea21f99970a27b7d040ea84e302bbe9a2bff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USNO10200965.
Sixteenth Century French Dances:Basse Dance "Au Pres De Vous"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca6539b39a79c0289d0da74e413b857b59adc23dc5a068c1ca10cd509d2ae58. 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/USNO10200967.
Sixteenth Century French Dances: Bransle Simple
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c66bd5f900895ca0eb6d288364755bd48f7d918170d553ef652d646b51297d. 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/USNO10200969.
Sixteenth Century French Dances: L'Homme Arme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0001d975656f380334e633002b6a005e28b024efa8c7806c8ca1eb429385d37. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USNO10200970.
Early 17th Century Dances from Terpsichore: Galliarde (2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f28848675cc5423452a5be8ed6780c2ffe60747bc852de74d855a14521f36. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USNO10200956.
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
Early 17th Century Dances from Terpsichore: Galliarde Diminutions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee293f2b7a05531f1b838d72b8c4419e82ac9f510aa7817a7450beef6bbbefad. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USNO10200957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7038b692e19b0b82641b4e698d96197383094c9cb58453a32300d645ea37fa49. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USNO10200960.
Henry VIII of England (1491-1547): Taunder Naken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53620d765b4700915cf7563a4670b0370f91dda1e92f7b9c958c3a22276abc56. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USNO10200961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb961266e4ddbe1ef0e2b7e784da4a9458f7592079cdbc5b8ba2edf1fca88ae0b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USNO10200966.
Sixteenth Century French Dances: Three Bransles Gay
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928ad811974015767cab5942ad6256f47635a5131d36e339c03fcf3d701c6aeb. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USNO10200968.