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 0x93b9aea997f57eeb504246e3c8db2c0e540e16c08a13fdbd745f8a0ee71dd770. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc713e08-45b6-42f3-8cfe-f8ece59000c4.json and https://artists.proofprofile.net/proofs/artist/fc713e08-45b6-42f3-8cfe-f8ece59000c4.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 0xfef32a72ebf3e22009d0f8f0c166201ed239f17dc38f955ff30f35546776c034. 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/KRRAR1918948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac5fcdbd2beab10d59ee789215dd5ef05ca3cf1354d71fa7978379246e86ac. 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/KRRAR1918949.
Battements tendus I (M. Ponce "Estrellita")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41914ce5f9d80e305d8c826c044efebe70e79d726c81cc876454f1b88c28444. 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/KRRAR1918950.
Battements tendus II (Y. S. Choi Op.1 No.1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa605258587d418dd89d3e1f09165e4258370956f5f776b19fb4a481d22019345. 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/KRRAR1918951.
Battements tendus jetés I (V. Youmans "Tea for Two")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa563df1bde9e2ac6f692ec7142dcffc4323bd59cb2e645359398d437ff5fd11f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/KRRAR1918952.
Ronds de jambe à terre (P. I. Tchaikovsky Op.23 No.1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f07682f825ec116a63c86b6a4d09830352797a5de144843a9393ef49769172. 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/KRRAR1918954.
Battements frappés (J. Strauss II Op.214)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae25ce7df0cf0628bfd171731d0db0c9335090844ac66ebd74d9a9c83f00cb6. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/KRRAR1918956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dd2062c7a37835f25cfd3b53fdae4c0560c29a55bee9b60568c4f375706f15. 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/KRRAR1918961.
Battements tendus jetés (R. Drigo "Talisman")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3a892b907dd30fb054d6bf78ffc08daf5b2c7000972d299e92a7840a8aaf3a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/KRRAR1918963.
Grand battements (L. Delibes "Coppelia")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0963b89b36419f8f6ea8935a6244b5de772129ceb7e249029a4c9fbde6403bac. 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/KRRAR1918965.
Petit allegro I (E. Helsted, H. Pauli "Blomsterfesten i Genzano")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f2da77d694587714682ca69352670a92c7345e6854873624601480b057c54d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/KRRAR1918968.
Petit allegro III (G. Gershwin "I Got Rhythm")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0df3e05d6843e14a3735071e6e3f6469e748f020acf81013aee8354653af3fc. 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/KRRAR1918970.
Grand allegro I (P. Hertel "La fille mal gardée")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43932c5c9c5a061696daa074bb9749369fef46f353d0785d3f1c38276f18e204. 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/KRRAR1918974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386007db34e29a64cdbbbf29b4841b8b73e7e746a222d4b5aac6ab79549cb1d1. 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/KRRAR1918976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b82ed3914f31caf871befe26266520d443ff3f62c111407709e73150e32a803. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/KRRAR1918977.
Port de bras (C. Saint-Saëns "Le Cygne")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc541128d04acbd5d3c680b454567c368165b48b7b789d2684fc1ea8590c8d33. 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/KRRAR1918978.
Battements tendus jetés II (N. Paganini Op.1 No.24)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c6e154630e2e8d47d579850f18a124d97e9fca11b558b2e4f935f725f1783. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/KRRAR1918953.
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
Battements fondus (Y. S. Choi Op.1 No.2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe227067ec6737818fb00e4d3a2101335a83aeac4ae1413457825c5c302bd074e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/KRRAR1918955.
Ronds de jambe en l`air (Y. S. choi Op.1 No.3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0dc0cc7327d0c21bad4235be34733726383af4137db81e8c50d4c046b9f4d2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/KRRAR1918957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbaae91cbba860c062f737b72677d58c12bfb590804f481aec30596bf014c19. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/KRRAR1918958.
Grand Battements (L. Minkus "Don Quixote")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92d32490e097dca70e4261925ffed9cb2ef0899915ca782e52f682fb676695e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/KRRAR1918959.
Limbering (G. Faure Op.17 No.3 feat. E. S. Kim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d5db608a4de437bcb8736ca4666b958e33839e208773c68591fa1eb320e02a. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/KRRAR1918960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30cb80c4119d6374901f0148f133f59d1e37188502149afa25d05c5035eaef1e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/KRRAR1918962.
Battements fondus (P. I. Tchaikovsky Op.51 No.6)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3244e6ce44324951901e6bd72dcacd009ff9b978864b6605a83da4cf12919a75. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/KRRAR1918964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ba291be39dabdf80d33deb28bacd4948b30308cc46afaad47f9e643c63ef6b. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/KRRAR1918966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886167c08173790e9644366dedc881965699fa8db8cfea80aead91491225d3ba. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/KRRAR1918967.
Petit allegro II (S. Joplin "The Entertainer")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda326dd6d11cd77d2f0bb6f8331f9c6ac7ae980d7bdc3d16d1825259545c9c2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/KRRAR1918969.
Petit allegro IV (L. Minkus "Don Quixote")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d153489806b79d2f933feabaa455b21694a3cd3610caca3adfeabd013dfc01. 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/KRRAR1918971.
Medium allegro I (C. Pugni "La Esmeralda")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196b14ce9d2619083c1f89f4c7f6b0a356c857fef55d088ab95658508e2c9d2b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KRRAR1918972.
Medium allegro II (L. Minkus "Don Quixote")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b97ded817889a4ee26b051953e63403432c45a1a973275795840b67e52c240. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/KRRAR1918973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df9f83f6c4d86a7773394905b3881dc2da1133525d5ae977d5482fa93a09ac7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/KRRAR1918975.