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 0x00635549804410203916b47c7f851c8699308bfec01d30220ec2d6d7000114e9. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56c1a934-04ed-4d45-a7cc-3f6f7359aa38.json and https://artists.proofprofile.net/proofs/artist/56c1a934-04ed-4d45-a7cc-3f6f7359aa38.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 0x1ff97768e129137f873ea7a9abe97e7ad54efbea05c74e17a75b7b775e0c1792. 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/QZW9N2261016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cda10e5fb2c58f802c3cdf97e8934da9cac57990fe4cec1025a7a597bf0892a. 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/QZNJX2390422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5d79f59e6bfbebf9770ffb10032f6e5a6cb21a28c07c3cc6879c7530eaef4c. 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/QZNJX2419833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c336549fb5ab7c20d64336aaf18dcc43cc5c43d96429d3d15464531231ae6. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:26:40Z), 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/QZNJX2419834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c0ac4d085f7aa86a3cd8b5c13779d470588011bc6498a56382ed83fb7968cf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNJX2419835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78426e125291748c7819e94fde920777a38fab6c4b0f9fb7daa0f13b94e51648. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:36Z), 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/QZNJX2419836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a165974530b8c922fa290228e666d43ac3de38fa086dc3ae5dad5f0efbde5c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJX2431611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444674bb350e9ec8042987ef7910469e31ad6419121897e8173833d9d4f6bef9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:48:07Z), 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/QZNJX2431612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f63ad162820a4f7033d3d936b8840a09c87ddbd14b92413ba9eaef4fc66399. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:51:26Z), 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/QZNJX2431614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb287304fac1cf2eeb2c2525daaa4a61a493841a287e019c00309e292749932dc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:04Z), 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/QZNJX2431616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871e5cf3b1146843ceb7fa4307bc99c0a85ebacb599097db6885b6545bffa470. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJZ2424464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf2252e1c24439ec417abfd0a25f21413b0a2248d4732aaeb77e73ec566dac. 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/QZTPX2448891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85402846b90efe5cf4723bbfc46b1d4aa4aa6252139726932030365cbdf395c. 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/QZTPX2448892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15bbf0a6fa7cc65e3de5c4b7177da1c59b54c8dd27919722640f6e24898291f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CBEYJ2447770.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 - Moonlight: I. Adagio Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22e77d8574e210a890c640219554c3b228d392e8bcc6b2ce40b7919161143b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CBEYJ2447772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8672ef1e17730be2c267535483f0bfe085a97cbc59985c9e6b02eaf9ffaf6c8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:22:15Z), 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/CBEYJ2447771.
Cantata No. 156, Bwv 156: Sinfonia "Arioso"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405a66273c26794d223d669ee24c89c483f338da0b4705cbad38512ac7e6f658. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:19:15Z), 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/CBEYJ2447769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf106c4687938f703eb47bee75393a3438fa26cab0a8b9d2d87b34652898f32f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:25Z), 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/CBEYJ2447768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf612a8fc6112395fdd57c3a8d49194b51da40cee6ee4cf6caacdfb273f9eae0. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:23:09Z), 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/CBEYJ2487735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597d1c3010aca123e6f28e867d4322b23509a676fad1f2934d68f12b24a75bc. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:57:12Z), 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/CBEYJ2487734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b69873061f0634473eb79bcb6e3ff5c8c429c6d8a526b4a0ad3a4c33cefa1e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CBEYJ2487732.