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 0x323f76c46aa581e0901850e1c4e015694a52d2227ec028b1d9e17912a15aeaa7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b25c592-e5ed-4296-acf3-769f258c2f05.json and https://artists.proofprofile.net/proofs/artist/7b25c592-e5ed-4296-acf3-769f258c2f05.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 0x6065729d476e4a47bec4066ae2d0e7556c6c375935083c0b401b0bc5426a1199. 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/GB8KE1957301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf045d923e94f2d53934e6413e155f41882df7ed3278d12542a216087cced09b0. 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/GB8KE2056738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1266d0e5e4946e6ffe549b64327977a22eb624d538c65ae9c2b15420f9be0e. 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/GB8KE2200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32c67fe5c6f8d3c22e37cca9d2d429d249542eba589bc53c109be329f41c5c. 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/GB8KE2200679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefab7eb6448c99892528f5c668fca4081d0884862e24fb582f631ad69ffb1d9a. 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/GB8KE2200678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef32c67fe5c6f8d3c22e37cca9d2d429d249542eba589bc53c109be329f41c5c. 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/GB8KE2200679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1266d0e5e4946e6ffe549b64327977a22eb624d538c65ae9c2b15420f9be0e. 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/GB8KE2200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f51fbf668dff02f7f6f9d216f161c0361d3354e278b9c8387112d37c1359b. 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/GB8KE2200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35289819c7a0bd0416c09bcfd34f39d95cb0241aab3baa46f14c867b365b7e. 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/GB8KE2321788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ef8b6e63ed547a5ad8d881798a8d227675fd32425b494cf99985f7fc95bcc. 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/GB8KE2405270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458f51fbf668dff02f7f6f9d216f161c0361d3354e278b9c8387112d37c1359b. 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/GB8KE2200682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d9900542b4b2cc0a9409cfed9b2b0f6546950cf28d2c9b907597584b9465c1. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZMEP2365738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7e33bf7a61b9ee6801153b2f5b953043b4a238c9cc9c599aa7d98342f1f9ee. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZFZ42249854.