Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-meta
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 0x44962ca00aaf60d29063368e10b73ba25c6be6fb8cbdffadb5a25f859f853ac9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07dedb47-dd5a-465f-8de6-640005015647.json and https://artists.proofprofile.net/proofs/artist/07dedb47-dd5a-465f-8de6-640005015647.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 0x45c419549834f8a9fc2e264bbd41e4419d26dabb8246c6c61b8afd7f3846c412. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/KRMIM1911247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd49a816d1185b7f3f5b673ca228d67fc50518614123fbceca9168cfe10936b6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/KRMIM1911248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f887d76e21ece23ed41688e47aba1d60789ac10202cdaa0aebdddb49a726f6. 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/KRMIM1911249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45dac95cc23a0a210d32dc5d30daf8007f38a0fc7224b532aec2f22bd16d2ed5. 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/KRMIM1911250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2862b4b74ba7603e8ad92f00dd4d5559390bb2dfcf568f11f9e16920f58849b. 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/KRMIM1911251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b684b0245db1b58e2a72611511cd6ccaeb4d40310326f4f3bc870649081a8b. 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/KRMIM1911252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa98dc36b6c840d151756bfdc508e75ab26686c4ceec677eb7f2a39a20d1e4fb. 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/KRMIM2027616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0701ac3ee64d44258c3d24e8f88ff538f36636dd83805e6aa97fdeb7ca48217f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRC712000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c4a790143cc58aaf188e06544bfd598f9bb3a17adde02912eb7c06a0254d81. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRMIM2027618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83606dbf72bc8c57b85bb316f1959d7f0e59de18e6bc545f9344ebe2c4d4ba. 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/KRMIM2027619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cd1281cae3d2d13087a72b10b4af3e047120c05a76bfb960684c6362807368. 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/KRMIM2027620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83340ea0f5225f297a3073e93bd9c751c4151d823aa7d9b7a789f557134bda89. 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/KRMIM2027621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb801199f9caa66d29e5c0b91f124f26532acbc73637b9fe9ef3d7d2e82db3a49. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/KRMIM2027622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137fb845865c7495a4d3ac269f2aa500adbeaa7d6650f4b7cb70cb84aafdb0f6. 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/KRMIM2027623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54cb7b23e46bcd1978938326a05a14306c85490e82816fa766c4d2dde237bf1. 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/KRMIM2027624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ae462d98ea6a568384cf0a1f8254cb8a54e690bab338ed9f9da2c6a05bb9ad. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/KRMIM2136003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b188c5f295fbbb2f804af135e9bed6e4f984a12fad8951545e1ed1934d3a9d3. 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/KRMIM2239784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb7f5e051efe6782e8fd09d260e008980f7cf2e4fb98889c61c4f23667ea837. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/KRMIM2239785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cb763ded089504809da82d42074763c9afe2fb47f86694e20fb255e88ff9f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRMIM2239786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb1898d3952fcb654785a3cfc42a2f68436f4eb7e184e2825536f9404eea122. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/KRMIM2239789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125b81d8c334ba2e3707859bfac93a22a5137258f4f7dd8be53ae77728594b86. 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/KRMIM2239790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e308a72feabc02f02a6ab3a7d5775be36ac514f90eb5372471d5be42c2bfb60. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRMIM2239791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe7b60773a61be4d7abc8d961b915e5a6f91296764ca9d2863e7560daceafd5. 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/KRMIM2239792.