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 0xc0948fa97bffce4204878800396129f7f82f037451028b46d5f8050d7cb9c62f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a8bc3c0-69c6-4850-bb87-a9f6b9ca38aa.json and https://artists.proofprofile.net/proofs/artist/5a8bc3c0-69c6-4850-bb87-a9f6b9ca38aa.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 0xa05d2a5e15527a7f859d5f0a77ef796241b647b5c3bb34aff524a5d4ef944f4b. 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/TCAGQ2212744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde66d396b1e2805c8e29491ab2b6907d07b3d686f2162489e28cb9a602c7267. 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/TCAGP2213670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f69d6176d3d7442bcd6cb86ba781753e2dba4c22215590f7ac46f5e4d738d7e. 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/TCAGQ2212773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151e240502ca2a970b2d67825b1a98f36be210dff07dfc2173f0c365b9a809dc. 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/TCAGQ2212854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ae1f7381d41ce8434116e7df6abe315fe45691e446ef90f85298046139261. 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/TCAGQ2212736.
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 0x7ea7956895e0d01540004e8d6e195df97484829b614a25e5653877602c860b32. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAGQ2212743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238bf00d1a3afc0e93e2a80ba159745cf85c8f4b9695fb43ca964fe0133b6aae. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/TCAGQ2212835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1d76fd6b3d4a6c775d5a6491f1d78b87994805f0162286ffd15964d68093e4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAGQ2212842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa11c7fdb901f9a4c4cd974b9fcd98161f610dac5291e09f1a64856c16573546. 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/TCAGQ2212869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ec90b0158a2bcce41f70ebd6e3f7cf8f857fca4fa02763b828df7d4bb05bb3. 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/TCAGP2201210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b4f94acffd686e24edce8c209144a13fc96d26fc51d264eeb39b84192ad2fe. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TCACX1730919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b764940ae986157071586ace23e09546a78cbeec07fd83610a6a2dab0011412. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:13Z), 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/TCACX1730923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02683b460a7daac6a2017a644bad1d27130374ab571dfd12ec24ebe5b05b19e2. 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/TCACX1730927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3984b899bbdee0c1ce4588f527cd8c1162d0d306b98edbdae32ba4252d3e4926. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:08:10Z), 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/TCACX1730928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5782ea7256abef191a4f9c05341aa1f7931bee962b36be35ad4f63a8a8d4786. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:54Z), 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/TCACX1730937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bed202f61240477dbac760f51b7c9bb80b048e96376bf10110ab44766bbc7b. 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/TCACX1730953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a8d35487d143c0e8ca0d5d38d648910035c85ad2d14791b5040cacbb6d9074. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCADJ1748321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2841bfbf73ccdb609a54efe8158f3cf2475faeba8c779f8d731132d8cc0589b4. 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/TCAGR2273606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4194f8354a93dc7fdf8a5768c60c076abc813cdd65ef235bf2899b1b3b3c85dd. 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/TCAGU2364619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be8beeb19aa33e4b35ddacdab329ce965c4eee084aacdbb164585516cfb2ba5. 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/TCAHJ2375770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6736f50a912f955fd936d601b5736314843b71a0cf1e18dcffb591c420c3b8eb. 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/TCAHW2423118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5160f87cc9836a546963f5af238ee64225c0684e0d09396a4b59fd309698b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJI2508319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebc04825149f58ab3b229e182143e1619100cbc7fbb5ee4b24945f446e30a75. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJI2574157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc853974827b6a24c923bd42170cd724fda337d3fdb0edae431e92311ebf8fb8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAJX2556954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf70a5c5ce7a169f20bc23cabbc46040452193fef83196d4d52a9bb038a931. 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/QZTAZ2309317.