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 0x3f635fa6e7ba4ac521a2b756182af1e78b020d00bdf0e9c84bdce486ffaec363. 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/30b5ca5c-3aab-47cd-852f-e1ab0230769e.json and https://artists.proofprofile.net/proofs/artist/30b5ca5c-3aab-47cd-852f-e1ab0230769e.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 0xa2bdaf37b8771d57fb834366ec53a9d38c9434e565f08cb9eb1f70fb746ce017. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCABH1257193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd16200be946aac04e912b32bbe2d67d9ff8abefd4e574d316750ab57ba6981d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:02Z), 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/TCABH1257197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0558dc35ed774b6f7dab60c369d8caaca834e6a14af7af65b7805e3b86f947be. 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/QZBRF1869941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c680a1ca7d5a52fc0057ee258ad719a40aaca8f129e41ad13acb739cb07b0. 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/QZHNA1941115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96c4b68d26f4d6284e5562e73960cdd35898e31ff5b32d9060e6925131eddad. 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/QZHNA1941117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45626cdf696d7ae3227fd2ddf1c45780937236946096f625178ff809449297. 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/QZHNA1941119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb617b4f3dcc37188d2cbbe99aaaa360d1b1b767ce409d556f3cb91306a9fb98. 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/QZHNA1941121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f83e0b2bf9e21da09620ffbd75e1f0a237404f5b8e93dd8283696f26180ddf7. 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/QZHNA1941122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2aac4edf1180cd0ffbc92dabb8e0d0f53c93d567aab281286673d2be565bf8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHNA1941114.
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 0x64d2a134b02f35d4c261fd7b9e2e8d6ec2d730d1a68d341cb9a98975bb1f51d9. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZHNA1941116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff80a6804103507f415fa458f4994c55f15fa8d5219f3d302c73f190123a306f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHNA1941118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33f31048e55d1896f3c3bfd19637fdb3374cb1e53350a6f2dfa1a63ccbf708d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZHNA1941120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9da867e3d4e0d440fccecfd7de9d13c309c34887aefa2dbb98345329faab2a7. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZHNA1941123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb2d68d2ca173dcdbfa2f7a8cd694a9cbf31a49d17d8a46c2eec0e1afae1f9c. 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/QZPJ32447986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935294a3845af2b7b1f74fd6a798840590978177e3740e117b49abe4617ea3d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPJ32449141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdfa0eba5d5223408618815a9b95ab15564803f4c995b6a54f37fdc4968f950. 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/QZPJ32424424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b88d77395bd5ad407e3027c4c3f90e3673975ef85447a89a688177a1f0d0f2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZPJ32486211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a5eff0e6e9695238033b6851b41de53a39e04158102b2d2f7953aebf62b638. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZPJ32469796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb2d68d2ca173dcdbfa2f7a8cd694a9cbf31a49d17d8a46c2eec0e1afae1f9c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZPJ32447986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18855e3b294be434ed650c8a7df5236808b90842effc01ce3a0a6c67d1057b1a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:06:07Z), 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/QZPJ32469795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6935294a3845af2b7b1f74fd6a798840590978177e3740e117b49abe4617ea3d. 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/QZPJ32449141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4e21ca940bc5d9d6d5ed5938a5faac9962448736cc0b8b7b322a5228faaf01. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPJ32486212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c368e42f700bf976010f8d1130b7fdead623bf2981101000af346093ad058eb. 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/QZPJ32486210.