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 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 0x4f3f5831e32b8b6f3e8a301f18f1f8ecec85399b7407b0b5901e1c14878de338. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b68e914-4415-4b8b-9db0-5718646871e2.json and https://artists.proofprofile.net/proofs/artist/1b68e914-4415-4b8b-9db0-5718646871e2.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 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 0xe394d54946789a69399cfa0d440f679f1e64a97bdebd57d7b293147307a278d9. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZGWX2068532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd84ece6fcb7eb554f10351e4f2660767917782d70cbd58e53a906eee38d8317. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGWX2068533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f0d38d1fc81deb548febac8f2c0afb5218217d07a4065676153a3ee7acedb6. 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/QZGWX2068534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88374d291181628f00feab50abffeaf2a5e96dfb016d9a72d6a5fef3df21ae6. 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/QZGWX2068535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adc29acc80f6050533bc9ee2eaddd3258fb89d1db602ad5dfb0bc36cdda2ac8. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZGWX2068536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2378f08049b225c712ae117eda20dec7448d8494a427b94d499f40a829605f1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZGWX2068537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d32e7e09534701127402f288e998271e263a70e9dd3fff426f0dbdb792fc60. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZGWX2068530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b57a1bc95f9fd4f48a068af906c82a3b7eb291387f58e16f242d319b086e971. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZGWX2068531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3202c0265d9b1f44c4cf23764589d93a89890fe64bcabad73339d04c307e6591. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/IDA040454104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dc73e3d3d3078b4ccda5ccdb6dd34afaf0c40d3199e353ac3c54dfc529ae7d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/IDA040454110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f367b525e25c5a32408cffa86465d916f9517831b0358bfd32a40cd6ad66288. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/IDA040454111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c468499c08a7a24e7fe00fa80b824da7269df54c89a7ecca50b30d5d1fb3aa0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZGWX2068487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4e54f91aa7ebcfbcc8580d3d2d5c7f6cab838527b2769d7c9e0a770909c0c2. 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/QZGWX2068488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf462434f6ca36dd78494b9c47acb8230226f801b0e3b8f9a200a571abc2984e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZGWX2068492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0113ca761646b480049b1592a242f7e78eff9f399d81c9dd2b0d95a35ad50004. 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/QZGWX2068494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aed7ea175003b594159c05638aec632ab2949bca7165769967e6afe06ea9c8. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZS672177235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c09c902f7d9b86bc8650e17173bbb5170b2aed92a9ae9e2b0f5cfea74ccd6c. 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/QZS662180213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86569b8b27d2dca69a1afefddff1fcfa2561db1102f3d5468583e0833c7da152. 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/QZS642159218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bed8a573ecf1ee156383a0db955f6ca0e9743e4e95dfdfe830231386eefa063. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZS632133070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc265a45db0652f2152b0d68a4f8d7c372ee4279808bbb7208933e12412c19102. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZS662140905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9c30055bb4adbc341bd2d341da447381a0de189f4fa5e64294cb81d3d25209. 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/QZS662187010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2085ce20afb86ea14c16a7a322b6db610035906bb9061bcc360d7a953b62e52. 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/IDA042383121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556a4257caae820085f24c21023f7be47500426e450f3e121f429e8a58303de0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IDA042383123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54803b80fb2d45bf2d6bba44bfb5dc403205c3d5293096e99ffc9e9a7b6902. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/IDA042383124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f655e803a960dbc47e7b389931e97f22bb34b705196c659116350b529e46d2b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDA042383126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fa7ddd26e2bc13795c5d9ae7abb3f7a100803db83a086ceaeb9493eeb490e8. 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/IDA042383127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c24794bdb4221dd399faba9e162fd382035c9aae41ea37b40fb9456d1723331. 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/IDA042383128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbace32905fe8e91332d077d2c4b1a42bddfaad971aa24a02534fd5a9dcce76. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IDA042383129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860414d7dbda01ab7d8458820e4d66959ba706869894430f3a783fd0415760fe. 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/IDA042383130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3ace749fc3861fa41f6c563cde7e29a242f188054ebae62e60f75763522bda. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GXBAV2428806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3751bffff9e0f30b85bad34a9e0df58dd8c4336309c6856139933eb27a3d76. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6I32492054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3751bffff9e0f30b85bad34a9e0df58dd8c4336309c6856139933eb27a3d76. 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/SE6I32492054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed25c1c675a954290c689a48ac352b38e959cb00612783bba3c9d3ad6d4c9d22. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXD7G2371564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d96f9710e4da8a53d530c0a23a4dd9e1dfc51abeddd415ac68a001b6e24f4. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAJM2558703.