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 0xf75ba2afff0a083afe4c5a9f08ba2aa9ea63a6997cb15a4a453e889d1c7ad0d0. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/213fd5c4-6e3f-4e77-be67-159df1ff4f5a.json and https://artists.proofprofile.net/proofs/artist/213fd5c4-6e3f-4e77-be67-159df1ff4f5a.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 0x8cb538e0fa25c30d29109c4871f6dfb499b030886777bb8070be27bbeff93861. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:22:40Z), 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/QZHNC2514940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d91e0d7ddc6b34f6f58b3c7a605f5a85024455ffc8c0b5ccc3a50906f6ced9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHNC2514941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e6e4cf03596c3086ffbcc9b468e495ee659699c61ef35a90ab38b14d8fe81. 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/QZHNC2514942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdecf9efe8494f112bda81a9a66e3e76d4cef3f4e364cd954f69279b7810ef1fa. 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/QZHNC2514943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdfc9c5672ab0684f51ff1a0811a671abf483e3662c8caa354f87059561a4e7. 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/QZHNC2514944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf255988492a20de9d35440be60aba222528e2a16c0c52e127f6b5eea6dede5c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNC2514945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4413ce67d7362e292523f22fb1fe154ea63a59074df66a3acf42bf7c78f05f57. 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/QZHNC2514946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fbb5dd3fc60118ddb7e77fe179574e76c331cc17ee39587206681a3c8d6c69. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZHNC2514947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15647bb9645cdb70d9bc4ee46f229d4b5f3d76643792749879eb1a4fac5de06. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHNC2514948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ccf5ba385fc1dabd93273200240b2793901488a28448108b84f74f86bb91e1. 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/QZHNC2514949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7e541abbc8fec7e16b4c971460bee931f838f6ac1f21b2877176f6c4f7e5cf. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHNC2514950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d99cbcc0a5b274b3ad9c112a0174334af0603fddfd84442b4d668652e46cd0e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZHNC2514951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9b6448732dde4ec91b932eca984c04c9903d1b5a9a45c7a7d62fee5c3181b0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNC2514952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d34040787eea261ec9199b4c20d19afb30e4ccdfa927094177ce8dddda1b5a4. 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/QZHNC2514953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35081c2004569fb84d89b902b8ed817ce2c20921575036ac4671549a5f49b08. 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/QZHNC2514954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb50e7f6952842e3bc9e5d65f6da106a7377b92902de4d699b6f355ef4496955. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHNC2514955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472bc0da7061f98ba6cce6836d04d8de16d118acf9ffeeeb468fc7f8e9586b3f. 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/QZHNC2514956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0629e7259d44485291f226ccc789a73d247430f943b27471ad023c214eb1b37e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNC2514957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdf2ade2c60ac532f13d7b708f7d22b57ec2d5add2d8a5dc3153a2f04187632. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHNC2514958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82993bd8f82749055e819e3adcc0fb5008775cb085ad7637d2f6fe8a636fc1b5. 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/QZHNC2514959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624c65673c339ed8cfe532eb7b13c62e86b25375b0942f42a3d6847f027c05de. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHNC2514960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9d8c2a951417376b0a9434120066b42601feafe148b9a51a6d783a4e522a4e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZHNC2514961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e16248aeee7cf7e813cbde3ffe36391a8c011105090be1e78db95ce8f9f931. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNC2514962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc163d79b19685a5ca3875ae62511cce5de5c09708ef8b358cb4cffc82df8c46c. 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/QZHNC2514963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f2a8a06bfd97be61f2bd580f777c01e56ad923ec3d1589413ef6c765404955. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHNC2514964.