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 0x456c7e4296654584a5711f0c2248be691dd03c6fd9c437cb9a48d68f294eb915. 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/7bd0717d-bc6e-4a26-914f-eb9418e9a87e.json and https://artists.proofprofile.net/proofs/artist/7bd0717d-bc6e-4a26-914f-eb9418e9a87e.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 0xe09a9d6b4524792711e5328f59afa010b0880bc7b1b773b5dfa6581bed61ecdb. 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/TCACP1624765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a0c056398dea9e30a1676e348162c0f054e1050f2a84cfc7b28fb2ff419ded. 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/TCACP1624770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bdc4003764aa0c723d361a97d08cae4a64c0b37e7f5779aebcbe1ead7e7466. 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/TCACP1624786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c57630c0189af1fa2b1f06bdbab33affd8c9fc39a0dc978ffbd57730001517f. 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/TCACP1624793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace2c0eb845876675554bce2fca164ef00a8eee4eaa1839e9b921bb499604178. 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/TCACP1624822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da6064e3cb28ad86e01f4376d6ba7f4315a9d020f61cf26d7162a638f1fb0d. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCACP1624800.
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 0x8ff8cec158328eefb29c3688a4efd82b1535f6e6f77e3c85f3d6d410b6c9e807. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TCACP1624813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed4ed5c86d01aeec6f9ba6cc1c87b581048c1e6d7e68b249386ec6af630cf6b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCACP1624815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd083be7f7f54e43c23cd4c8c8672b653027481f65f90a4e1d2baad309fe11a52. 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/TCADH1712185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71ad944e739667da01e787c046ca6f022d2cfafc96d4f39252adcf364fd0e45. 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/TCADH1712188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea828da3a823d18ddad364bbf06161ec8365d7900ca5e5e0296dfbda72a0af6c. 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/TCADH1712189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb242cc199749e6a0ba6044c0705dd760bd18c93a4a7134e7237fe119f81b2c2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:48:30Z), 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/TCADH1712191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a4c72c6769c00bcb27c4a8c1d85941bc586308ff5e29eb3a60e8de3e106b0. 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/TCADH1712193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d461350e27eb2b40fd8ea9d53682b195f5cf5378027ef8fdab9cf3891fe14a. 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/TCADH1712196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a4aeae9ff79402ba1174bb1b74754c17e8a17c14a46d514ac395771566a21a. 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/TCADH1712200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd79cf95d5516b87c87261412598f6c9dcd676d7d6bbe47ef248d3711047e2c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCADH1712198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede0017f2b2e7efd1f80afa095c28b9b3187bdf1a78eb324e60c0d75328c6f8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCADH1712203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e5e1c7fa0bd450dac2795a274a317971b1705851f9ae3cb83a84aa4a0d44ce. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCADH1712205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3774d5983300cbf8c5b75ed5d3896fce2b5432dbab2d0871e8a45fa1a16ed959. 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/TCADH1712540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6bbcf8b1a0e19c9d39434474bceb1b9ef42537a7e1abc87cf81b0a8518f46. 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/TCADH1712543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ca651ed2cdf7ebc38f952eaf0ff0858f6333b21497c8b2ff4801e44274ed35. 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/TCADH1712547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e8b381c1a2fad18166548bfca8384ce1537c2520365d3774d986aaf7a101da. 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/TCADH1712550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2e218d7ce7cd1b602ef99707ad690d0579e166769c822770490a437f0dd27e. 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/TCADH1712552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc36fbcb0bd28ae16bc78959683aa37f7a07537461743a2e4e62462a71dbe4d9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCADH1712542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4a062cc723a7cedeadaa3b84c5337ae052e7eb130ce1bfcc2bbd2868163b36. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCADH1712544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed553462ddb1f900f498982ce1723b73830c9b79a09f8f6d06f09a12d4b3ca3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCADH1712545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ba24582f828f1bebf7d897f1d220398327f7344cbb5a2cd71db2fff6d17973. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCADH1712549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ffc8c5773d772615048128f258631df7c915bbdb5ad2184268fdb8e25c365. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCADH1712551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c72c562f5e5238a6f56148a44779a2a00ee430ab743b40005e4961777a5df2. 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/TCAIO2451729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85ef9d211d12aacd97451f86a41ae7d69272f4f7f7a4bbd0eb124881f19c5a. 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/TCAIM2419178.
Please Come Home for Christmas (feat. Paul Eason)