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 0xbf1fe945c2405fee841e201eef201dfa394914ab1b193d7f051612847e920d74. 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/d994ef05-95e7-4749-8bee-e316ca566ced.json and https://artists.proofprofile.net/proofs/artist/d994ef05-95e7-4749-8bee-e316ca566ced.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 0xcc4ca75aea323845005b0e1840c7e3e6580c303c2d2ca15723d8ee1288e2fb81. 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/QZMZ92596322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcf5fa36945b34c0bdf293effba4758b4c8624484d4eb320447c8d5720c5675. 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/QZMZ92588695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4edafeef6059f3d500778fa4c166098da536d8f4187fbb8fa516286a56ae15a. 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/QZMZ92521986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1eb62992219053dfebd66c4b27a78dd68a504be86af440aa1348fec00ac464. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92503399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f39e3f07807c7ec717a9ba020061b72c3166af5aaa4552cfc9a9e0c80f10e25. 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/QZGLS2509518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b03c09db47a2d42554df8b791bd8157849fff357737f15931cd1da1342ad40a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLM2573231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba031d324ee193f4ea19d4b0736b15548daefce80a1b54ef8a16231d5cc0d4f. 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/QZGLM2510806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c5b52c0e8b852695e96bd6d1b21ebaebb3f6db2e6785b4f55b3a93bd675f30. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG2588646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754a13a3b597b82320a5b526de5172a76b0396a18208cacc044496ada40d3df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG2575558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0205c176b8428f118b4d8d140f7c1155c0cb430e8db94996ae4b39aed540930f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZW9L2483698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71e424960643210828b6271cd212dd8cfa2d18a00f89f268eccc2f19bfc7b8. 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/QZTVM2433164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb093f9c26cdf802b524fab510f6daa5ec1fb1abbbfdfb43942cd4bfb1a83ee6e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTPX2439449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a80e8601136c1a2335e176f8d231bf1acdfcae4b391280d2f489e01a0a38cd6. 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/QZNJX2449952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dcc23e145a559528b064639ddca00bc99e3b2d1bcc754404c3116cabfaeb53. 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/QZNJV2496747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197045956626555eb3272a96539102ff3ea67be4b2ae03cd7ec0e84a270c1083. 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/QZMZ92458968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff5b52c4abb223eb42d86625044f6429529d2e8ec3f65edc04a639742b693ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLS2427166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eb7d17f26900a1dea59fa1006e6413fa50dc032ff03621a461c537030eb016. 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/QZGLM2434849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b7259fc381bb7f053043cb4fc881b6dfbd1018c0b5eb29a155eb36bafde19b. 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/QZGLM2483164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157308ef0599c12d4274d779fbdc6b4c13ac29901183931609da7e0e76fe9104. 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/QZGLM2468453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b4094e9759d62e185faeae2570a9d723cdc290cee1544bfd6821637b931e0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB2420920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd629eb986b41070d51b3c29585ff9b535d328d929942b600637b431b463c04dd. 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/QZW9L2317321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a4ef8df98541b7bef4b7ab343f0bc77e2810e513b0d91cf0348ffd318e7149. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZW9L2340611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8935848c2d173b62d49871dcac057c26e45b518e23427cbf7e6f369d60fcaf. 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/QZW9K2391264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82c9395de8284621955effb2d18a12918958e7116aeb100bc92562ea27ac655. 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/US7VG2431357.