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 0x26ecde2e7fdc154addf7f2df6d02cf4983963da0d4c2431943a21c77de944599. 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/87a1cd4e-ac94-45fe-ba20-62571f03049d.json and https://artists.proofprofile.net/proofs/artist/87a1cd4e-ac94-45fe-ba20-62571f03049d.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 0xc56f09aa81e800e63c671434bb7ac7d9e3d7ab042abbd1b8eca6aa9b9746ebf1. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CA5KR1564052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad9524cd84943c879bfd8fff9a4350cb2e74341877c00e285a9e01f5574e620. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CA5KR1564054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dffe70fcd5bb94163c98ca528910acefc3bd8ff1d023af0debb817bfe789c34. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR1567330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86498cda3b05f53358cef83be86451d4e480b99a798e3bf530bf088efd7a52ad. 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/CA5KR1567333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ffc45f63b95e9ea8ed2fa5a36d6c1f6a3aeace69ad7a8029d303b731cd005c. 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/CA5KR1567335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0b465746f3c46067fc33f4778f20cdaa0ccfe4943edb946153a1edfbae9ec7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:15Z), 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/CA5KR1567336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79599c80a33ca17b5b1a0a6efb612889ad535d8c4e7fecc9ee4eb362145be67d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CA5KR1567338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f959d5eac7bcb596c9ca8da4d28569cb0c3fb3aa11d022135c629057de0321. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:22:13Z), 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/CA5KR1567340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bc080bca23e138de024410b281b1717d3f18d0cbc7255dadea69881490163a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR1567346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3f70a1437a1c1c22e36eccae72393678a51694394e3db6a5783d2e29e48a2. 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/CA5KR1567347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646de914ddb3ee5c78e932124b0264bce403d7c30490a27b6cae101633245bb1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CA5KR1575972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf749043fd0919cda9cd8882c7da24fc401f3627b29f9a1895912c22156d215dc. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CA5KR1575973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294652ed52928d854769c50ba6c74c434850f2f36fe85c6199973a094efbc47b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/CA5KR1575977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4969bffc28ea939226b266a0c306f4ae21ec6c28d5efa62368d98307f47197. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:04:25Z), 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/QM24S1835407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5958db18f5c61ecab0fb37bf64bd5fd2e08a6c9eff6e87e321589eb585c027. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM24S1835408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa149c923cd05998b08a7d4a9f91d9986354fa6698c9ccea42441b4d01f94d7fc. 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/QM24S1835411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e89dc6df6695d71df55dcd7a122c4b2f1ba5cf4cb6bade820d623d2ea42a4b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NLRD51966275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c46f75ba2ed0152955450b309e36f5688bfb5a3669a4bfc287a6639cb579115. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:43Z), 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/NLRD51966266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0747db0f6d33c19ea4e31e464c7c6ed451344601c65dde8fb4b2fff198fde957. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:52Z), 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/NLRD51966269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134176dd9dcd6a0c47dc6f1912bd4da36fc34ac10fef93a6bdaf40bcc1dc29c9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLRD51966270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29a05e4ff0ae19fb60cc7da799906d64569e5cb92d1e5cdd59ad9da8bd5f922. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:42Z), 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/NLRD51966267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15bfde9eb79d2959a709107f98716a1d8f069bec11f1e6c5a680448a4248fe2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:06:09Z), 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/CA5KR2322029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aa1d5e3652897e93004d60d518030cb9d367b3f66c8fcb136dd214b6569438. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CA5KR2322030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67c14feacee565bea0b473edb2a09bebfb4ce5f24c71f83be4fd184bcfab28d. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:39Z), 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/CA5KR2322031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d75f02cb7d202ac46c8f1c1850f9360d98539ba5ec6f2741c402dde7a52511. 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/CA5KR2322032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71658eb3d8c04fae8aaf2995eb4b99060a1f8d34a25fb4f36d37658acb2130a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CA5KR2322033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70080db63be87628cf15e47f3347d8fed8e5bce3a45e6d3c5f31462f9a0afab0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CA5KR2395621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11c4565f68f0ad4336b8bfa7008626d3bb360555e840d1f3751d00e5e51f6e7. 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/GBKQU2101975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6fe1526e7be417b721bf296e68c385e7572bfa10692010b4ce3566954a82c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2101979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00b918c724ec6740d11c38c4962ff6439f458c3f9670b3789ff85d4b254d478. 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/QM4DW1831671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa342714581591963aa8b389834fd2df688c5cee0a9de299b1167826e49fff78. 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/QZBRF1866166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23a0724d9c78c4078b7e7be4acedcf60b66668e4e5d2a944b28100e9c1142ec. 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/UKZGC2501577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1159dfa4715e2bcd09183d9a9f749fbd12ee4be80f344da9ffb6069b5b4e78. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:59:56Z), 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/US3DF2244607.
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