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 0x0cbd8d37ef785d35a31c5210d7aaf4fb9ff675a08df130a95195fb6753cccf42. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca3e1dd2-428f-4db9-90f9-3be0206d1f44.json and https://artists.proofprofile.net/proofs/artist/ca3e1dd2-428f-4db9-90f9-3be0206d1f44.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 0x5a8f7d66a9849127144c558c6cb287a21cfb69a613afdbddc8d246b6cb4718cc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM6P42004624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1996f53ab8dfbd21a0b475a27bca13ea1bd3dc5ef2e952c09c7a9f484b3aa321. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCACF1576605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf528665fbc4f1ccc93ace051d788384624014e42b5e73402a70074d6814db62. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCACF1576608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0bc5888d213343b285e13fcaf7d7fa97fd0206cfe4be7d71b252720a80567. 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/TCACF1576613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41e7752213ea8aeb5371513931449d3d16dfd0f3694254a2b0e99653e03977. 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/TCACF1576616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe66b1e57c7d83de22d8b4ed256dd4f2025f061a19e045ade787562f4e2f821c. 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/TCADK1778660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741b6c89a10e24a738ad9766d4124520adc1ca93b96382ddbc5f89e9fcfcbad2. 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/TCADK1778663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb1ff3a02b3975a9c8644c94841393cf02d8f15b087f5421b31dc4a4094ebfb. 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/TCADK1778664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038912b323c292d12e76e546c88f2829d23788703e6362c826af839e64adbca3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCADK1778666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b1d5d41f72bf343e69b6116f247bcd60db56fdcaeb02cdc4832b5904cd0373. 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/TCADK1778678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d9883521dad29f511f17037860e99c0523d75c6f6ad72dfc4911e2410d2b3f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCADK1778682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262eee7f586f91f3578c9233cb07b9e4d9575e698f590fffc0c2b33b5edef21b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCADQ1888490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc358c03614de435ddd21b9b2d837971a9598d93cf2b148d0cff726da477bdd65. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:57:05Z), 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/QM6P42004534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd27b4c50da1e8612dbf0ced12d0b56b730a7f8a5c5d4a1cf7b47d241b63ace. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMDA72155596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94d176d18aef8a0498f40c0956909b5f584142ee2587c178d1e02a84865991c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAHA2308162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751bd88201918f9d9245016337133f9cfd7f9ebf457b3cda8534a7f7c0c44879. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:05:05Z), 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/DGA052307409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73ec5bfd7c01672655b1d8d2e381bda9d7efbf2efb44cd31000789c587da4ea. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:08Z), 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/DGA0R2320972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c96dc76dbf2b0034000c0dbc1b797d67d9b357b19861aef1fc2287d4fa7809a. 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/DGA092473332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661aaf2ef313bf9033d5b3c8623d94c0c10e29f9fbf544a5900a174e4628c1c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:39:04Z), 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/DGA0Q2433126.