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 0xa651c40fbcc41089e024d8863c839fa205a5a8d53cdd378d1aa600984bf23fae. 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/260b3673-e574-41d7-b192-82d137fe03c2.json and https://artists.proofprofile.net/proofs/artist/260b3673-e574-41d7-b192-82d137fe03c2.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 0x4e52747a54751ab9ec3da7efe1d2cb0c8b68e3fb2e0d2286d5872b9621add83e. 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/HKE022258029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a37124afa8753265488bce404a75ff245da07dda5eeb273ae3cf3a8d6fc884. 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/HKE022258030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04db9469bc5d4311ad4df84bc93a3e95fdcb78d90ec1becbc4b7b1ef4235893c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKE022258031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eb411478682ab4e05e8602a371413090c0923ff1464c0bde4f43e67320220f. 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/HKE022258032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe20e8873cbc606124059ca1fd59fcb5ea55783281a92bc3f7d3086c23c891f. 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/HKE022258033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b93fc751efa7221d8a8eea06226a11e77f6ff00571e314d592731edc6425e49. 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/HKE022258004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d18df6a77fbb33e9b3f4ce2f73578cdc0bfcc4fc635f8b1827060ccdcf9692. 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/HKE022258005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959030802f3b9747362efcb6e7496912fe97f03f1e756354fc5ade921aff5476. 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/HKE022258006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd26252de32dacbef5f58070324c13f75e8ad9d44294a2ddbdcfc17496b4b2d. 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/HKE022258007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0c3fbc48d6ba64a133b4260450b902134ea993f18d15e08257e922e309b9bd. 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/HKE022258008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b45b10526abcc5e80088a18f4d276fe89e2e9b4450422172d7543776acad99d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/HKE022258009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c7b7189f519e7a9e23478be86f907e00759be6f10fdbba0ff6235f17fc2716. 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/DGA062372495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0ee18dd9dbd23b677e89df0d90315f5727f044952b9724b96bcb72929aa9bd. 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/CNZ632401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339344405f6dbd0170ab5c12cf32ac543f41de1fa7595fa787729dbe18623522. 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/CNZ632401573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2bf50aac46b12d437b780f50a2e9f118be137d8148ba485c0cd01534926f59. 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/CNZ632401587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a40965330b36425ddb74119459956fc22cf421436b0fdda7c95fb1bb9e0968. 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/CNZ632401586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef30f769d50bca44001543d581157a7e7e081c61ee17250369f315870657301. 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/CNZ632401585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ab283b808d1005da5948ddf0031ecc54ccd34717c301d83fa49e2913f30137. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/CNZ632401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1811251d72732cefdc73b2fe78191fd991cdf7f8dca40912a58915352885b65. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CNZ632401583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2565f91b41a2bae0d3d624342e0622b299fa247cb451111976dcc45bad9d2023. 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/CN7632401582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc898b62df9e3efcb5b8723424f90360222c18892de7f3f71d00c78ce1375570e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CNZ632401581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aad6e97d2fada766ada78f3243cc42d60ffb4d634ef36bb036c755c27770a34. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CNZ632401589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333c8506a2ab525dfbe06d0914d80571fe66c0e15dfd735c16eda0508d3c342d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CNZ632401599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0c753939cfa76185ef9bace0f71b44199c658d98c3237b9703b61a4ff896f9. 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/CNZ632401600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7cb6db9fc63e061d35fb5606375750a735c1a2f9eb2614d31a4359c2216a61. 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/CNZ632401590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897aec1719473703ac540343949bc0cddcb55cef3b9530eae7c03013dcbd2544. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/CNZ632401574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936b12a37b23f7ff43aa07b4ef821abd0efb344540828f419e840cd57190d0a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CNZ852319711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78267c2b7574027b9f886c81bd678f5cf39480e23a65f8fe02444b9abcbe8db. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CNZ852319698.