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 0xef203c12b2619705a7e6836eff5769e8cb9e42007ce49c0e59a5d815dade014b. 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/b1bead3e-d3b9-46f2-8cdc-05e75c525174.json and https://artists.proofprofile.net/proofs/artist/b1bead3e-d3b9-46f2-8cdc-05e75c525174.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 0xf85e46c766fc1261caf12f540dbf5100cb755f0572b7ccaea85a8597e1ba2d90. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZFYW1914178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3b60c8255a6575571fad800f96399692d4c149234d17a15b1ece0fa981251b. 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/QZHZ62062548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f94ec51783d5b3468f1963a59cbcadd1a18fcc494a6bb64f97301947b9897da. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:14:00Z), 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/QZHNC1913030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8de500231d8e61046ebb291dc6562fcc70cf12521968313d0b2a914105fc02b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:01:51Z), 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/GBWUL1941374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe318bf89686d2e14284eb748c691444a809e1d29c5cda7e7961eb7519ed1c8cf. 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/GBMA22098280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e5ce0c8e5139f03e03833a18012b38165890e6f145a00dc81eb7b915d06e23. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBMA22098281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac19dc16edeaa7497e7021ae4081e65b6b8b7443b76a2473b2bd76aaaf00404c. 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/GBMA22098282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b1e65009b129d7169dd126dfaf3835b9ef2e73dddcb935155e2901a559289. 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/GBMA22098283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0802645a4090607852664dcd029b192a9b90976e1ef9eaebd25b4bf084d0c99f. 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/GBMA22098279.
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 0x7eb4ce5a6d8a3def55235c47e0ac611ccbd756218195f91679f88b8bf65257f8. 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/QZNJW2056074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710aa712dca52739c91b1692c066571dec3a9cf99c67b3248bc85c0f9cbbbd23. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNJW2056076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6539528daaf11b22b4f09b877352380021a40f498c065630c7614bbdac0b11ad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMZ92102019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed1a18eaebdae08836cd57a7a2a089721b06f4c5641af92b715a3547068f67c. 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/QZNJW2381490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854e17e70deeae4ddd828f8c89122debaee1d8411acbac8e222ba95ef305fe6e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZW9K2336502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b6beae745a53fae89213210f07a48cdcfc6eb6c885c9e006bb9401469b4fcd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDY41905184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797fdfe419788efbfb5835d09623e2e89326fa3ac9a539aae75fbb1f8ba3ce67. 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/USDY41905190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2176d2e419fd847c592d6d5fe1fe97d4fd2123757dfe4f5f532c500d6cf0ec78. 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/USL4R1914297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa29bb2f0e4ff827a32f9ecff755cfc1b7a390876dd91bd2e313ab7ddf42a22f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T16:25:39Z), 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/NL4NL2170706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa000d97cb51a7207d0182be0487c8211fccf8616773cac758290fa8296b58ba9. 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/QZTB82400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38db04f714844e319871e1a14ca5cb0fb03eae7bf1885f06511aefc1e5e03bfd. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USDY41905185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29793d85f8c8fc9fb9871f0cf6c29336711a6fd3469d75b822b37916b0f23577. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USL4Q1999327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c78d3645e4ddc0cb4aab103f49c77df8548bf3739bba94d2fdc1461b20c54d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QM4TX2191122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb51bbf6dd0ba4027feeff7cf19a8993920c93a769c62adca55a39de90f44a1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZMZ92077368.