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 0xee64221b837e442e6739df7846ad40f17b2eb64232b6f0a2ac89ace7f81bc3b9. 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/93adacbc-bde7-4e0d-b9bc-0f3b869b2450.json and https://artists.proofprofile.net/proofs/artist/93adacbc-bde7-4e0d-b9bc-0f3b869b2450.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 0x85db14a388eb15b86205f3e93ca5553aecf0668f5dcdad9649b84c0afe6b2d40. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCABQ1306741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735470d34fdd18063bb6a07ff0036007304ddc1546010f5920b4a15ab0e42865. 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/TCABQ1306954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9313aa89f8aaba348e14481988ed960361e27045475239ca322c866c853a6a0. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCABQ1306998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c94e5a0fae8205ad4e0969ad20d40937c0f7785f32e5cff4d43fd75b0730656. 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/TCACM1670240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e28b64e35f3d114cd5eef23ba2d1997933f6edde32bb942b7bfe150257dfc0a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCACM1670246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390b646c0eac098178e4d263cdfcceca9595150c51a1806b2bc0fe3f579b8f9b. 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/TCACM1670253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7676ed2b239d2d10d9c9715d2b57d74771359951c0ca2866f2c6dff032c3a00. 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/TCACM1670254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a4a84b484fc8763823b3f5e44123c4808df9249bacd81e1c3672a2e1f21e06. 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/TCACM1670255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2fcdeea6dc539cf3669d9b126df411fdc367951840cd90fab1fcbb8267eeb4. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/TCACM1670257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a6b918d5a1c1fe33fad79da2b819fb8a43efcc91a735c9893c7970655e1133. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCACM1670259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331806379a75a46cef1acd17df5e35d7bf01e482333273639c38501c44a59d3b. 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/TCACM1670262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4812cbcf04f6e84c25bcf71cac50c2967a2eaaadeb7239576ae791cd749f07d0. 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/TCACM1670264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb331288b8c20c225b546a8800323f790a2264890a8ede066425dffcb6c1d6e34. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCACM1670265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96a1344398ba1a26ceef2d1daac42428125923c1f8d4defd714614bd1531d8e. 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/TCACM1670267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d8887ad839f098821d410a79a4d22c2dc0f306d649519fb23a90209b7d2912. 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/TCACM1670268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22f10d7f7cfae8fc51f73f4926dcc47c663f7cdb32f612a5462a83841bbe75. 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/USME30900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3312844906b23d1c56be2b4482e3ab17b60ea1eb5111abdc25d2ae469b65bcc1. 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/USME30900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c83bf2d5d009209e97f387d710076ced7fa525b9111886d8fb22d8eb222a8fa. 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/USME30900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57c405caec49d5ab5cc6af32cadd352ce39d89e880ba313895323123eaaa8c2. 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/USME30900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb613f11583c2a85066acbb3819232c43af615407e89259aeaac32d37be477dc5. 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/USME30900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204b084a03e73c2bd8d29c182324dd86a0b237954408503319f29d366a264fb4. 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/USME30900092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1eb65083492aa8cca679014e6198f88c3ff31ddc9f64fa3b621b47b9a58687. 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/USME30900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5681082d6122620a3124eedec6b8ead939fd945bcbcf51848fe847aa509c00. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USME30900094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d17d9aaf1e865048b29fa01a1993ba1dfb6763632bdf25ea7fc37745f4e1fa. 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/USME30900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7024328a5c093a572180572df9af316efb1d728be5f27bfa505c6db59e2e8826. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USME30900096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef82ca5d835b614e39fef92f14ecc69a67f453f7cbfb02d9c24306bcf78b7e. 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/USME30900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4b8fb7eb516dfddfb00a4e4d137b6156b13fb827755dcb7d64a5158c87bea7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USME30900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69352809dc12e034b97debe930230f0485a81b3b4809633c4ea9872ea9b7ab1f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USFST0510701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5444800bd29bb04e5a398bef5f7bdac74da5efe55b163fd9641482c10371490e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USFST0510710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b45cbeca6dc99e363dd365db8a12af89b7883684974aeab124ee8494d2e22f6. 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/USHM20835050.