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 0x0ffe9c8751bb0ab026051de196eb9d4718a9377df68672ffc5be441af52d883a. 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/7e770363-385b-4069-87b0-9b5a28d80390.json and https://artists.proofprofile.net/proofs/artist/7e770363-385b-4069-87b0-9b5a28d80390.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 0x927a5f0d9cc6ef7475cb52cb55fe7832122a3716ae50032909acc7028d3a4510. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6P2074977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e81021d5950f1e6c338c9cb87df1e6dd8900dfb4aca2349e1dcd6dd90c959ad. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6G2051133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364ae4ce892e386096e4b178795c7aed68e3ac30f018cfdde80621ea85ca7cc3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USLD91750408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3a56fc3a161d2c00c95f5af5aa69bea0bb57930a13e26157756028aec752dc. 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/USLD91752159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e617fa4d852ff79fdd6177c4036e9d90ed42efa2361cfaf9e40598afa9ac07. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:43Z), 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/USLD91752160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d91e9f0b7ae3222df3aad42a903c5101089160da40eed3de1bc9c97843fc816. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZVEM2374164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ce5da5958490852f2014545b30f4e4cdd6b5c90847fbd18e2bc9b80f5d9cfa. 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/QZPEW2401988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2fba614c790ac5d430163ebee55d327b9f0cd574541b78ed9a25f5ad5e8f3f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:08:05Z), 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/QZPEW2462557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bfe3392397eade910d063f886c07126c7910969c41da80dbf47366fd866b04. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:30Z), 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/QZPEW2462558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4fba48d10c9ee7c2c8dab1bbee686e20b1ad3af175414fb10876916f577fea. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZPEW2462559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3d34156395ec69947270b8d1628ca01298f5be287ea4a334672e966b9f985. 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/QZTLA2479935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cc1d2ad54d96326c6b19f8ff5d82574c05bc677a3f503ef5261570ef8e430f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:12Z), 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/QZQAY2410710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b04b382529adfcf7c68185813316e1d2794a6457173390767df880cee0096d4. 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/QZTL92450914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669f5993fb55c535bf514a641b286b3d9a6d1f8f9116a8d1aeffe57ff0d89463. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:20:00Z), 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/QZTL92475513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8a16668b636b2b8be7df0a999d5c80f89b32c8deaab05e03760daf0b608053. 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/QZTLA2405370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38531112aa128c0ae3cfc3274d9b05b3f47334cf9cd327a04af7b6039ead38a. 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/QMDA62595925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba64b796b8fdded3ff75ff5e6cfc7bd3629d77317e759dd615696af0a8e659a. 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/QZES51993529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7dfb8fdba75a65f768aee44a902f393bf1bb40c922eab5eb87e6497ca13560. 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/USUYG1413112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a426904b393f56d5e6a70150f454324f59f644dd2bcd975a9b3b5b6d0b3765f. 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/QZWFX2428651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74bd31fffd9f3325caf9474bef1d626206f953524c84c0ed6c20a42c1843c99. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZFZ21969444.
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 0xc12a25a157870e2d1247ede340bb13fcf9ccff5b9b4e2ae486a10258ea735e15. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZK6J2125595.