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 0x90a924a89ff55dafeaa47a146880166c6197a54613a97f3f4964d2f15cfdde10. 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/af78756a-f67f-4d7e-8e83-123ae56ca290.json and https://artists.proofprofile.net/proofs/artist/af78756a-f67f-4d7e-8e83-123ae56ca290.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 0x41a08eba87e28ae7a6da350115c28021c60f54a4dc2741a655a5c741a5c3704e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:10Z), 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/QZK6Q2259887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4349abe59f13a275e076407afbe1adb5ef1921ba0072c6d858000fac6442edc. 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/QZMEM2262097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb757f176a6772ac7b7afab7a8ec41b0889d26f879e5026b2792d3afb83ccc42. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:55:53Z), 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/QZMEN2242853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3bf9346d4c15747c9d756327d102b5db572e06ca8169d7f4abe4111847c80f6. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZNWZ2213871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4232729eec387eb8f23594d423a6114c2c092d6b748beb638e640cd31d308d. 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/QZTAU2267516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba72d71a474e70acae0f7d62da32f4f2571ab290e714a9311e9cfab4690217a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEP2344821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e63745e7dc7010bae2623390861db17b3e8b521f88f20ccda0e89049d4112ca. 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/QZTBB2329176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f5fc9634588f9bb59cc6973f3b5557f2b5b265c3a37c09bca32c0137765fa. 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/QZTBB2329179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebb06e82fb915a9ff7891284edeeea9bfaa3ced75611e0a511532784f5eb61c. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTBB2329180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84f3cd30368cfeb802840003f1ac270b3d05d06fd0f620ad660c146018f1e57. 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/QZTBB2329181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a80468267ca02ce33ff106935c254677e5b0b7ab3e505cf9e9ba18fcf46ce7. 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/QZTBB2329183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8db098ab2ceb4d6f64921739de690d799684341e9038d91ce9ea621ab29d25. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZHN42439526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e49b54eebb67d3ac57132344e712b44e65f29f7e31a7d98f42a1f4bb2189fd3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:38Z), 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/QZHN42439531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6646d0d14580b55c77e2f828205b00a4e19210c80038602bcb8567059f1e261. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN42439532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda9726f0cf9be83e8fae4dea8972f292b61b6234027b2dc1144c18944b30719. 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/QZMEN2451690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27b7ccbd848b83d31bc9e9ebc2c97357ca27ecba2c240c03b7bca88d76e89d1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAW2467350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21eb8bac6510531bffdb63480cedce2692dbc5028f301118c70f72762e7ab85. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:26:09Z), 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/QZTBA2429248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faddac6cf818c84101a66c0fe8e6aedefd3933e57d95e1295350d332a160e71. 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/QZWFF2420510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c9cf585125555dab6efb86ea7a8270d90fa05646a0b7fd06358557a645595a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:59Z), 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/QZWFT2441141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6cbabec6266c058f2416e49b3b9692544336a16d61264b55da9ae9c3cc2c8e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZZ7M2419118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c524ce2d0dcf9aca135f1e69a4363dda348e27dec312dc9ce1dbed8c202d659. 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/QZFYX2520733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07441cdfeb71a9bc7abc5b539c488aac8638196803bbbcff0e5c8a2408053dbb. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZFYX2520735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71be6209d93f9e047d877c64fdc6a3064eed35edc932b9563388f7ef726fb8d. 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/QZFYX2520738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9280ad2a828bfabccf0ad933abb1ad41f16351fe1c018657379ad8d112e04826. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFYX2520739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6970c90063feded291270c7b74e063cc0d4aedecbc65276556744fc168620eec. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA52517994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed33027e2c86d9d7ed53efabbedd6a3f3c2ebbd7e95b70eb223e6d1caa7819. 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/QZES82558478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d92f55d2f471549fcf01b83b77629d629e59abbc23f39efc1b25725e27d3a61. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNC2526097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d086ff9be0ea5108f84b61eb44da2cf59e341d8d278f5e1c6e2e7d44348b6a7. 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/QZK6G2576370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5528430c295deda0e7b71efdd2fad8062c77511fbc477cce06ca1f1b010d35e6. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZWFN2507203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e7ac69670574a0693454f827844053b853d64131638508b443d4a834f64056. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:57Z), 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/QZWFN2507204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef81090275b282ce6a6f0e781f28a6527ba516b21796f99069eb8a3da08407f. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:20:17Z), 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/QZZ7T2550764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e37813fc4633a0df3597f31466896e211ad34ab4b1a1e237b74e78b5266f479. 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/QZMEP2376280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29817ce7a7bc05cdb6e7e3a0c308678d13f123413b4bbba291466225988f5da5. 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/QZFYX2356718.
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