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 0x9890c1fbd2f4a6c08eb0cf955bd6f05ed765788647f116d5a7206755664e543d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cf24e2d-e6c6-4a02-aad3-dbcd62b65796.json and https://artists.proofprofile.net/proofs/artist/7cf24e2d-e6c6-4a02-aad3-dbcd62b65796.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 0xe87def895aea94860ee1b9009c5a7b6b038343f5ed0c2eec53e4c4521505d3e0. 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/BKCMX2400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05f0fe2c10efa9fa4d1ceaea168c3d17afc932f871b671492b0dd273d72f296. 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/BKCMX2400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f08b3c643a39ddb5d7d6eb21350c6da034fbe26779a26e1081d3fb9ae417a2e. 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/BCWK42400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e6b212abacd0d7a91e8c2f4152f20e2df5b43d0eec038fe954016f7f8e0e6b. 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/BKCMX2400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc371781da171e59db50fae2b07b5389c7dc2b41c97d6cd67baf0a74027089122. 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/QZGLS2439722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb52d835b922b8a44072b6b6d366021d3e840f5ed9c1cb11f3dcbfd2f1e85d5. 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/BKCMX2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53709c6a484ef0c43d33fbf5e6cc0788f63c3f3366233f0c13d1a3763641fd6f. 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/BKCMX2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0d1a7030026eb2c2b4526edd8427bcd48a0d61d589ebb1ebf172dbb8d15c8c. 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/BKCMX2400519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596767a67f8f72dd025dddf12b76c688236ffc79e4be4dbe7daa162dccba22a. 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/BKCMX2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482eea5800ed4afcb53b27fa7182068ad26bdb13e4c7c700229f367240f66fbe. 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/BKCMX2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b9e436753506d1e6743a2b9c7830406191c4d9ba83207b943be9e2329d0261. 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/BKCMX2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc582cb855456250fe50a3d86c44cde957a440e04179f14f9231f1365d1bd1d1f. 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/BKCMX2500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ee195560e56df3f73eb4dd0ed030cc634945e21000bddd141582b29a21b62b. 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/BKCMX2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac6411bd4768477b375df13e4f4b9773138509dd41aca81f5c4e9a743cc793e. 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/BKCMX2400521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44cf51c15aa0924647fe7215b84b3be9564164d5e53f82502b57bff7afb1e05b. 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/BKCMX2500031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bbaaed2eb8777445bd131975e23d7583df9440a1babc2b22bb61a55e1ceb75. 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/BKCMX2500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd758def1867a8aac31dcd823d2fc05e48f94d0511ee87e8031e1e70a6abd28b3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BKCMX2400558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15526bd16d3c0f5175fd0456f09bb30b733952738b01cfa0e9d1dcc6cf620256. 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/BKCMX2400540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97d3a63e6a1ebd713216384af25f841a36c7c76dc34983ce41726ffa585ac08. 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/BKCMX2400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074b89db07dc949605942dfe7a69dc3f61715d9141eeb661e5a7539f0da8e542. 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/BKCMX2400456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf761e9434fd29aee8d4e9c6d04ddd20cb758cd5cc6af70b77c036d2b4d777383. 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/BKCMX2400453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54512ffdf8aaf92d5fa8730a816749d92af5f8e5e13d88dda876c4f728c46fba. 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/BKCMX2400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d07412cbd54797d791c0541acd8f707ea4b3db30e900d459bdfa9bf8a17ce12. 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/QZTRX2429414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf445102d4b68051b862778d3c04e511c3481e88b5ac1d3d690e60c21d90d0fcc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BKCMX2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a08f362459336bc454fa6c107dad6f9afa83d582fa281a78fdbf2725d0d9eb. 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/USLZJ2593172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab08c37e4cd3aaa9a7130ad7969d82bf74e2498e25bd1eb263b7409fc83f26. 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/BKCMX2500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1098229cd86122f9c53982b8108feda485241ec5e3dd3d04398b9b4f389d61cb. 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/BKCMX2500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8e00b15fa3ba5f9c60d55ae27f15b351851a03bc12ae2d1756e8a60f379f48. 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/QZNJV2527066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13398efbefebf9f19bfd82f9f1cbee197a357620d66175fec0bb255a2a81a3b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BKCMX2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce06eab5da6dd90f4b546dcbdfe843caa0cda419a6e6531848611665194573a5. 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/QZTVM2370148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d986b106e9a90d1a6409a31c4c4213ef9eb098e8cc70da22cc37d741cc1774f. 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/BKCMX2300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06504f9a2942774ba85af16f480fe4f970946d019c7675e640d1b9fb4ca1c187. 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/BKCMX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ff2299575451975b923fd59d6ac130cdf3a4db9d30a533ab0d9920bb6b358. 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/US7VG2466856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909479e29a9991890c883f6d6cc70db8d54bd96bb2b7b110e2a770043237eeb. 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/BKCMX2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356ff41cc4636fb72a4232d2e78d4ce53bfeb48c9947ec0734c6e4e297299c39. 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/BCNWM2400004.