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 0xf053aadcd12a595e7a1d9c1423f3a4e849859fe9450538cfe4a8db69936cec1b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85a32255-195d-4fb2-8f02-565becca1be7.json and https://artists.proofprofile.net/proofs/artist/85a32255-195d-4fb2-8f02-565becca1be7.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 0x0d1ca9628319f956d086a31460fb367bba94daa4164fc2871f3de03c715f972d. 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/SE6QE2317753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc859a04de33cea0352dd1104dba7bd42487ed88c0359cd9d301d6162edfe3211. 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/AEA0D1806618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c52ae5729ea25f0b80413721f39e4cbbac4533a665c4abde75cd79246d6714. 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/AEA0D1806620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d6ea7cf7aa8c5edda1092b5d5e6699294386d4482c77d447d716090ac7bd14. 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/AEA0D1806621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929627f88b815147f726e0823f54374301275ea4496e404712840ecd110dde6e. 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/AEA0D1806624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39de4bc1bc4c9086dfa8f084668cd2a813b657a400b227d94c338a725c22dcd1. 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/UYB141723001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb415e290b685c2ca052ebf7018deb983ef57837fa6cdd37bf1e9644479d046d6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UYB141824102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c9fa6495fe54ff20e4f8533b799b1dd92298a83217f441315393594f6e048. 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/UYB141824103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67de43078c1749193485edad9a187d9d51007aaaddaf2363a19f3201a530c784. 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/UYB141824106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0008d286866d6e679484454d2e12a84fbc089c3c22952bcf7105b8d99118a13. 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/UYB141824110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b739c27c9e96e33d22ae1b6009b41f25972935fd9b2537ee1890548f96ca2d1. 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/UYB141824111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd6cb6eeff6028bde3856ea67144a5713320ff682e90acc2c4c56e87f8751ae. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/UYB141824108.
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 0x1634e13cf6fc0acfb455286d50e7cc1f26d64ec9e56314747e67227efbb00ba1. 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/SE66N2213770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93795a1e4512195816ad48c905c7ee12aecf23063278f82cdc8da45306dec8. 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/SE66N2213771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f24d088fab3d6d924af54669dbe0d55fb16257da265ff6f247c2c4734cda5b4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SE66N2213772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39e01f9cce2127d0a5946820db491b8b819c39d8825abf91aebc50199962e8b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE66N2213773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbf81768f891df7ae7832e6f87ba719854412ac7ec0da6e6002ad5ddc43a1ed. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE66N2213774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b124a108a1c5e94209a4494dd89bdc23953b9b43609b10615279348f2e13a9a. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/SE66N2213777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfaca9d71b4267892ab3ddd844f5f0f01ff4b91ef151d6f97e91c722dcc1172. 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/SE66N2213785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246d09f7c2c2a1db21e365e1228363a3bd045bfebf32c47ac8545c4387bc3559. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AEA0Q1806764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3035aed677b91bcc63d6e708f9fdf84a8e8cb3010ff4e153bc329824ce64777. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/AEA0Q1806763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c940f23661761ae7b409c2b326ee34d3cead7f4f47141a9bd0b736574652152. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/AEA0Q1806760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07409f4c7e2325f46d30cbfff500e217cb13e6d641cd50a49aae5539abc162af. 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/GBMA21868713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b7114d83a3655e9f073e3ad22cfb69cb1695b4db7402fbdddbd86e4766131a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBMA21868705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3840f58e3ef6567ab154a3fae7074b64fcd92d3b8c651aad99458f189bebb54. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/GBMA21868707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756ea75b7ffdff62adb1b3bbf60157aa8b99004fe55b6136b145a193f0b78ec2. 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/UYT142100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913dac9bcfb87c6ce0a0cb9ab4c5271595e8fc313beca0d99d2b5818478db618. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBMA21873810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5675cefd67e7fe11283a045b8a1edecd73242cf3bede3d3f5d8612528eaf3958. 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/QZHN81978108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19550920ba774cb77de3b14fa807a2454f0b417e87170a4e225f3f726be846. 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/QZHN81978109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2eb5da714031e6e1c9c05f58483cb118abf670d14763df32e7ec0a7135e858f. 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/QZHN81978110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2432d88a743a087cd88d864dd6c598238ff29856e40cbd527dc4d2782f1b780. 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/QZHN81978111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f706e8b16378b7fdcf5e9977597310cfcd61a41cfac0a68bffa99f16f8fbde. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN81978113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1688d419fa168135a963762465f79860e76fc82a4309df7703ddb6539408b5. 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/QZHN81978115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ba88226e3ab11e21d06b003d8072440d4a6561a114398a724646562e45c8e0. 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/QZHN81978116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3503a78736dcc33d9400f5c90a2cc0b0b2e9d5636bc2225e45a00f77a213fba7. 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/QZGLS1932445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732b3b83e15ad2d0ae4cbd7cfdb798343be9bde6ecfa0cb5832338dfcb780adc. 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/QZGLS1932448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f52204e714ed144fede6c226df9a51be16459bb1109a302c2a313781dfeaae. 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/QZGLS1932449.