thumb|Ductile failure of a metallic specimen strained axially Fracture is the cracking or breaking into pieces of an object or material under the action of stress. The science of fracture is a field
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c811bf4a37d5709338916242a2d01e27d740feeac82d6557100d4e0de83bd5. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be4dbc00-a209-4cd4-96b4-d2cc54e51703.json and https://artists.proofprofile.net/proofs/artist/be4dbc00-a209-4cd4-96b4-d2cc54e51703.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d262e6909f2ffa01a1af6ffca6a248a63061327277902c0adc4b3930c1ddea. 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/NL1S62400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699032bda59fe13fa8f522c5c62c9aaeda9417cf8519f27784d489ee4e925af8. 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/GBKQU2429329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7092f01ca9e46e5e357a7311c37e49ef5aef123f90248f2ea0f1663cc84210. 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/QZPLR2377467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e3535dc6d15183d89bf10d313890cc94d9cfc7916da9941cd8d9001b615168. 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/QZTAW2271844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64057da42c6174ab3676ef8b986c46991c46f6fc7d42d4742988549fae005c4. 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/QZNWX2255200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2764b6addc4175f9e5d4ca07c9aa0c15246c11c911beae1e2e48d45a67b8bdf. 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/QZNWU2202677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78f3ad41d237a2e0108c5bcf6de7bff2a124e56a54684b7e12527f019e6d31. 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/NL1S62400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4809e6bbeaf15767154a073d447cdfd3930f62a082484a323099568fb6d4e305. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/NL1S62400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe956e279a9ae82db4a7cc2bacdf1831bef0ad59360bf34165363d590a6d7aef1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NL1S62400751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a78f3ad41d237a2e0108c5bcf6de7bff2a124e56a54684b7e12527f019e6d31. 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/NL1S62400731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7343af011e6001a1906e53849ae3c4c02e49e04a2368322ffbd72366616ca16c. 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/GBLV62216684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ca7b563329922fbabbdd36cd1810e0ba48bbd3f08503c6984c53a1c7feb2ac. 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/GBLV62216685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9999e7f7b1add093b46c6a49704b581883ed8261e9871226ce1c8c396bb6b52f. 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/GBLV62216686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e3fac3c834196faf027515ee8089430265bfe14c278771c86bd50e44dd2a19. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBLV62216687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f77a300651263959a8445fece2b6047e26656cb7ab7fc1783eec6f35d180762. 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/GBLV62216688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d5771e4c0612d97c371a4d1aed5d9a775f3d70c2540ff1c7a6a47708a2989. 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/NL1S62501071.