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 0x0ef425785bc686e8214116487afa912606dc8a72dd2f0159c93c39e9d87edd09. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6464002c-0906-40bd-9c17-d8741702273c.json and https://artists.proofprofile.net/proofs/artist/6464002c-0906-40bd-9c17-d8741702273c.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 0x2cf3dd221b6ac7d2fbeff625a9b94480e62edeb9d575b34be23c9c628d4cdfa0. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/TCABT1462070.
Season of the Light: Valerie Saalbach, soprano and Charles Lewis, trumpet
10 Woodland Sketches, Op. 51: No. 1, To a Wild Rose
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23227551e889ec83f9bc66de8265971806aec8317c58202f2613c5557347fa12. 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/QZES61890849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9858b1bb47444b62ccc005e0c9da46b918144821146d246cf52c963b3a231eca. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZES61890850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376772862136aa4e38383359dfd1fd7fc1dcb3df262180d3251f6b5cfc5af43. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZES61890856.
Kinderszenen, Op. 15: 12. Kind im Einschlummern
Children's Corner, L. 113: I. Doctor Gradus ad Parnassum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04585f51f6481b578792366ced1f8639dc992ea9cde7f14eb457fec0a7ac840a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:42Z), 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/UKW3Z2000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc59b2df9fe3ef0e12ea8aafa79d9b7248ec86bcf3475a8717cab2f4c532b378. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:48:44Z), 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/UKW3Z2000533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d86239d5603ae9a3fab93261302fc0875b45dfc47e98e3f08b6305f8580fe01. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/UKW3Z2102340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18123b5daeffbe9b480276611190fa11e4039f5509debfeee52377d44310636d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKW3Z2102341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8143b52795bc3663244b43406b29708e43593e39491f450d7cb355bc967bff. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKW3Z2102344.
Lieder ohne Worte, Book VI, Op. 67: No. 2. Allegro leggiero in F-Sharp Minor, MWV U 145 - "Lost Illusions"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699d49273f0cedcb58472d38f8d70b4277f75baa9df33bad3e41cbe3de37b474. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:52:11Z), 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/UKW3Z2102345.
Le carnaval des animaux, R.125: 7. Aquarium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65404165c9850ae5ddbd8a7321d871ae1adc32c5e8b7663ff658976f56f13167. 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/UKW3Z2201193.
6 Épigraphes antiques, L.131: 1. Pour invoquer Pan, dieu du vent d'été
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87b84518767b74a2afd1ebd47f9f53eb89dcde505bc31e2c501e8293bf68f39. 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/UKW3Z2201195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783079d467dc96d359d350d50a584067641902bdcd0e09d2fa3ad99e4fb037a3. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/UKW3Z2201191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade87284bc5125ab61887ed9bc4caf3fd9ea0f1bddfccbd08de1ba000ebfe35d. 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/UKW3Z2201196.
8 Pieces breves, Op. 84: No. 5. Improvisation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc649be4a76baf5aedf353e11d6e84af6c20f57e5be3abce31da96d60fd00552a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKW3Z2201194.
24 Préludes, Op. 11: No. 21 in B-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c264ad4ee1348f5820312d87ce8b803f561cb5468a368225524b60730f7891d. 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/UKW3Z2201197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe9d70cd73e9d15692f0ed8b1e27476b6c9c2759a8a108c1a5c8cac8eb20c38. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZ8LD1976055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b00dbd2cc4efd14130efa703167a7aba939071c79775e29c8755eab0bcc39ab. 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/UKW3Z2303395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb686db5a11eead0ca8d9f6298e7c8e8b5589df644b8a2560453f1c3dc960d45. 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/UKW3Z2303398.
Concerto in D Minor, BWV 974 (After Marcello's Oboe Concerto, S. Z799): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447518b45dce9f6556a798b854c267eba2b5f5cf7217d7ac1c53708e055fd568. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:40Z), 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/UKW3Z2501284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f982d36cf646d19fb9eed6e6d3ba7c8d0c4549bac4d05ed18abf588732e2d9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UKW3Z2501285.
13 Pieces for Piano, Op. 76: No. 10, Elegiaco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6de6f026bbfd2e2931040779876d1ced76e88f068018b791d0536a562e2a55. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:47Z), 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/UKW3Z2501286.