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 0xc251f1097e1f4f9a78343f547c2d39252932481cb2cd93bffe0fe4e624d9201a. 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/d51638e5-84b6-476d-909b-27b3bd28afc5.json and https://artists.proofprofile.net/proofs/artist/d51638e5-84b6-476d-909b-27b3bd28afc5.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 0xfd9099dbb2065b562930c37228d41e530354b33972d91240b35b508354e5c2f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM7282321341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda8b466a93267e95db283cb7f6b18c14e63d9afc015e1cd3007fe3e6c7bf78f. 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/ES65E2200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8698090249f515e3d34958cb2ddcd6891396a330da858c30ba0e76f37f5b5bde. 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/QM4TW1966136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8c4af6d6b725e7d32744ec89eaca9a77fb1ca2329e9635a729a37c3d866a8. 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/ES45D1900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f04d9f29a8a9de43e50d7a635500bdb5d459ee306ba68549c5241d8a0541094. 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/ES64E2307406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c14c59fbd009b5d3ec2b9ef978bd369217561b5460422eee1d5981088eb19d. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T17:18:34Z), 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/QMFMF2019841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde3decb1b60fe086ea7990be4b4a7aeca7968518171c84658969f1726a98aa2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW2279528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245019414c115b21c7785540c562db69690ef31dc44dd755ef350e92cc389a8. 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/QMFMF2103137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa699eec7e049137ca176d700754f4df8edea139cafbbfcb08bb2dfe4b16e28e. 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/ES64E2307408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2870db0388eaf148f7c1e366785512de85774a534fbcbcc607d146e194c9292a. 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/ES64E2307409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e690c2acd27afe97f0c65f038b19df516be87ab0706221bd3b7c2868717639. 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/QMFME2024610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8d868e266edff37918f1dd6854b88c6521d771088b2b444e403090e284d44a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES64E2307410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f75e5a88350921db83aa3f4907ecb06e291c6fd462eaa0d9d2e726e0871c2e. 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/QMFME2456653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1d6f517555dd587b30cac7438002ea968dc46d8e1fd6924846a5f1bf7496c. 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/QM6P42308831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3681e420bc2cfd2f41e6272016a601be0cedf2c759bdcbf7f61a296ca42a92. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM6N22301677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87d0e58464d99248862504d5ea7f556f4cf445db7ab4e6c7ef768cfae32936c. 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/QM4TW2348241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714908247bc67e97060bd086f5daeb433c5797949dd42482e0b96b7492629433. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2267231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff1139aa6d7e7e25912bfb8b8494ea207e68863074fe94408ea26fc2a5ea8ed. 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/QM6N22192782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0d717c66a7fe2f4d3c06330ea73a2a698b7baff636258fd125b1a830d3381f. 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/ES64E2201320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddb57ea6e1016715bcc505c66a0a131706170c5d3106f49cedfd280f8be1166. 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/QMFME2053346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99076eeac12ce612b5cc512f0a2417aa603a278bd071c2101a5916328478e347. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92052237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4528f16564d52d1fdb91d94a37379c56ae3f332f87a3ca136cffa5770a637515. 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/QMBZ92019713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcac934563bbf4f851d84261f6158232897133cd73e5016bbb8d76c737c5b262. 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/ES64E2415399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7327bf40b0f8ae24693c101d9575c869882c8164c21e55237ce98c24bf4e42ee. 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/QM4TW2470956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81126541e9cf64d484c2f936be64738a1ef75f56f0a7c4c32f2f95d44eb72c8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES65E2200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb004b5ad908f23f79f40ec07fbec01d985e4b280a69b9444294423b461896a. 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/QM6P42047740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfb864640d3e79ae5329d3963a2142e0f85b772eabb80edf24993f42a1d3d4b. 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/QM4TX2041778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c08ac660c99de6a76a339515d010409f82cc76cde7e32a4d64fd12edcc11e5. 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/QM4TX2007881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fbbdc20a0c8bc5a0ffedf2bf0bc39bb6553c4b9c8058c848c539944536b914. 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/QMFME1972794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89da4e48809490395578dd6407dc0601c680c2ac38f263ef6da867b274cfad37. 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/QM7281927118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8016cec8a446f55638f59e526b81f92bcb226ad2395c59f321f967a38dfdb2. 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/QM6N21998188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a5c62d3ea3a65c05370a9c9f8a9e9056416afdd7a35ad125c8264f4a95d9c6. 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/QM6N21925376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acb40252473381eddeab84762fef86c15e17c33110166096e63b0cccba89d29. 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/QM6MZ1960490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc451bc4cb3f32295ee26c53bb3bb1cfc41ad38e726be949325e34c276f8e8b9f. 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/QM4TX1946850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f145d777a43bd72b8f8ad68287f48a8cbc22f9e9abe24cc012d368c0c08fb6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QM4TW1989156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d05fe94338ff033f9c57338923d3425ae5234b3789d093b0f09d366967394bc. 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/QM4TW1942897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be158e34fee8865497b0a585ab46be715f491b2d4d2cced8f03cf9fbaec6096. 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/QM4TW1928799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac0d8bbb76ab4ed86ad2a83e7c1eb1343b5c0d37bf0dbae0297ad93aabea38. 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/QM4TW1916352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556ae9438ec3c1f6ac6f2b25307c8b8cd734dc16605878058db232fb96ac4061. 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/QM7281876626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f9c76fc354e6a6e70f278179812e482b27542bef6cbe1ed275d0ffa6a484ae. 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/ES71G1940631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbabcc23abdb4d8a5d2c50670a254edaa3a5961b802b03ab9dfa52d15360134. 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/QZN882224804.