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 0xcf5e651cf4542c3dcdc2b4f5777773f5fe7572cdebace50a38ad380d35cf695d. 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/c6a2627d-602b-4223-9957-544978648897.json and https://artists.proofprofile.net/proofs/artist/c6a2627d-602b-4223-9957-544978648897.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 0x1f23436a7e7c1a7a4309ebf34172a9cded959e5a880c859549c8aba3e363ead4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4Q2012109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c964aa2bf912a2d18cca2c6fc2c6c2ba7fba5c47c2ea1361cceb54e97f634. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USL4Q2012110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1a30ee44577fa29861c90c4617cffd3328593f928dca6975311594c2f67dd0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USL4Q2012111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac931a9b15785c3a1e3171fd4ccf6cadb13b8bc155f413ffd09cbca3730214e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4Q2012112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0b8577b5624074aead4a01fae89ea224b0154bd9f45e77b690d24e4974d62b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4Q2012113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb4318a8db181aade9a298474edb4c42bdd70cb7f9cbdfab0a629e3b92c3459. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USL4Q2012114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfc45e14298e25712790b2e1027ef1a9c99efec6526293e145ae1cdb7cc6d7e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4Q2012115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d90f1e14575a481c0bc675345949420270e915b930b512f6b9d52b271db9c4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4Q2012116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaabf34a0a0d5375fa89941f6e2f600e89991b08277bc1543dc9da0f040b9f4e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q2012117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedfcb03816d2b212f0ba8cb9dec8258afaae043c6592958714fa08812593ebf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4R2074114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ab431517417dc62c738d09eaf431187a5b820764b25f430822f4e5d93e6019. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH2111807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae838991284e39c2a3c0c8d50f8457e014adbced1e1a33a6e2d84a028038c2d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM22112831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94a8e4081019d24bbadeb80327ccd5460a86d1bcc66d706a752da677ede3050. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USCGJ2202671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bf30d92ef2eff1c633cbb620ce7c4166097433241b0c3402dd809a316f0f58. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:28:12Z), 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/USL4Q2121955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3819a236504bfa498bad2ca8d97d5153d77c98d3edca4ea3d53087f753c123af. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ2202672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d072073ec7214ad4278971f5da2f88b36e6cd98215f42d7a9697473ba6c7dd9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ2202673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eeec1cf35e8b0b4b39e240845d5392ed3b4ba4d080709969c9cbb1d45c041cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGJ2202674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1339c1170af49ab9a0de69216226e0c096bc8e84eee95858c86185996ebaf4c8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ2202675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db98d682d5e91f7f30d9f2e63e502e5f6915d33185fdbbfecff9f32f398dfbf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ2159465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cc4b30e7a80aa9f9f25abe6bbabd6de75d2b62387e1945df7421ffae78f6f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM22256027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e0596705ecdce6f59298e846cb82b37288ce8bfb67251ad3f59ebd8ebdfe4. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAGN2204445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5990313137b5bb40278f5d497220411baa9bb12e972f97fd78e15852917682. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USCGJ2307888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cb879f074aa8f9cefb8c9c9a398b20409673727972fe13fd4707e35a357d77. 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/USHM22381747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbf02eecbf049e3c9cec4762b232819336242b36e70044d36bfd1b112c7dffd. Chain 2 (Bitcoin): anchored in block 957640 (2026-07-12T02:27:45Z), 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/USMH92377108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ee6befb706b5a2472e0fbfcb361678e7cb156a91ade67d9e50719070abd718. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHT2310085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d370175ad02c0fb6c1d8d346e98b43551ce95c80f1a95872752817b2f13067. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAIH2404360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fee75e92615744710a36705747ad396443170dc529efcfdd504846c147e6de. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIS2427478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4ceff0b856bb4b9a557772190e3e915cdcc011b27f84afe317b6516412880. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJC2411878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6436807718d73060b57f6496e68ce50c6febefb4680a3799c4841d4cf9ffa4. 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/TCAJN2529928.