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 0x07d7d4a1f75faae8d873d678ea90cc9e82d1083dca5fd74f5f66e89e705697d2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d0cc3a-f0f9-4ece-a68a-c1d307d667f2.json and https://artists.proofprofile.net/proofs/artist/32d0cc3a-f0f9-4ece-a68a-c1d307d667f2.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 0x05866b55d749888ae8703e0dbfa7e34b5dc665f42f9e91143f3cb1dc9f2ebfff. 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/BEZ109900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a08ab967d151ce52dc908e1704caf9029b8de4cfe9c17f3128749e77f4bf3f. 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/BEZ109900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aa5ac277c799018d2b89cef56877367a34f820adcd50120ef24055fddb81bc. 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/BEZ109900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb6d2db5522b9b5b1dbe33c1460d0f0c0e884c28275366fe2b28935c6bd49a. 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/BEZ109900700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb381fd7fffabfa7f3fec5f8e914a107a8bc2f760c43b665344639939f24ec62f. 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/BEZ109900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1c2fce023535dc8fa4b89bed729281822a29d53cb3105c69d50a7aeff1e471. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/BEZ109900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f4295fba39fac9ef18a6870f6b14ffd7f93414160aa855ae47171bb03e902c. 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/BEZ109900066.
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 0x3864cfde6cb44aba39672dab9cd8c4831f85567109eb8c9b6ec3645765d75fa5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BEZ109900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7696233a38c4e7a86c30b288f02c21b5d01a0cf2cfadba5b25050252ad92569a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BEZ109900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94a21f87b29a42d71142c05228486e20667476449c2192f2b12edc52bf0adeb. 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/BEZ109900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a181e1baa115da3b3b547a8f5b774af4608c13c6490e1b9fa585b003e03b6ee. 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/BEZ109700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21f6a94b332fd8ac630f05815a8c3267b3dd027f7e3654f169c418d5530de06. 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/BEZ109700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5219717fe350a957472aa138fcf598388b1185729d72e47228464591f03ca5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BEZ109700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8457885e6e12c1be899dbac086b54b5cc718c265b77571b05b7e5f43f70a5ecb. 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/BEZ109700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e61f5db767e33dc350ce9c359ff21bcb4a8aae5fcc9738df5dcb27b3b55a0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/BEZ109700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe651f3cda455bb0039ea415c759b51832c1a49622e0bb5f913cff219513e9039. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BEZ109700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f71518cd0156c0b4b2cbdf5ab1ad3f17495ecef01cfcfcc418c6fbd7fff2017. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BEZ109700220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7287aff15d70539bce02ff85b090c5b35cfd4330cbd36e61aadf630c8b471. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BEZ109700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441f82064d8b59c841a1da4dda376aa1c5b67178625a4083c3cf62b655fff475. 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/BEZ109500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa085889f12024aae71b64b22e505432d453bc46415f6bfd4fb68cc0dbbb9ba82. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/BEZ109500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa6d485e2103c02d4bea0d1a34a5cd0d8c11d4fd9d7374de1f5d490c6a78e47. 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/BEZ109500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ff775caa9489630d7de542cd7fdd71f6fcc72ac9d3c803f04408dd328f5384. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BEZ109500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe304709dec11097d3feb5e4ae23aaefd2cd0646336b66b3e3d17d6ed2547eca2. 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/BEZ109400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2860291df09d60ce521f3bbe23a62e613daff3fd868496f9540d3388cecfeed9. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/BEZ109400030.