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 0x38c87815842ef12ebf5deb0725011e4edf05a7fbc36953c9dd5c0dc9af7f3a2a. 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/a34001b2-b915-469b-a197-a2a1b48b03b2.json and https://artists.proofprofile.net/proofs/artist/a34001b2-b915-469b-a197-a2a1b48b03b2.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 0xbed0b4a9b0446b8a848eb143c3d73a8f4c98fc56b7e4cdf662d9385d11a3e140. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES62255069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ba8ea0cadc752474b3fbabfa80e5a015b434738598dbdde13291f6bf76a57b. 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/QZES72200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d173e749477ea0f3a83dd40cd6ecce8edc642ae4cdc049a075bf575502893e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:06:35Z), 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/QZES72265664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99271488d4f37312a6be4872d444a0a61e55f4fa5b3c63ea26d7beab31ba919. 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/QZHN72265888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443ce69b47d7e779c9070a792ada82459f7d20bf69fe0dd4eca8bed6a861c56d. 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/QZFZ62302163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb59138120070dfe8869d0a2928bac6e7dee9a4b1f80bc46f1e06e0693cc685. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:24:49Z), 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/QZDA82318363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9e07c3b5e1bf636eeceb0be766cc7282995809389c5c640f418eea04e8341f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZMER2346982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffebfec7700fa0a9ea1d49d21bb43799f4d82740002822639faf541232e764e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNWZ2332703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0a452ea21d804b40e50519a9d2c777b190fda3cd08d1bebfb98563d94257cc. 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/QZS8H2109900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0a452ea21d804b40e50519a9d2c777b190fda3cd08d1bebfb98563d94257cc. 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/QZS8H2109900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad12efb106f4e5b97bfde13d03c9677aa13ff77ad0d8f6416f5397376f8baed2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2306389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad12efb106f4e5b97bfde13d03c9677aa13ff77ad0d8f6416f5397376f8baed2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:31:30Z), 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/QZK6Q2306389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdc5ac25e3212eda7aefee3efb83279f192a7e15eb1c903ab8274a90af23445. 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/QZZ7T2456723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcfc3fbc4dd507a924f952b670cc4775205b9bb5a6b0d581ccb665ecf7da2b3. 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/QZN882528245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aff90a92e857d5b4c46225d02d9f2333aa003a5c92f222d11762c32285c9d2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN42569334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e4ab75c12a7dc4857a761fc33fcea0c18f09250cb504acad2a1d417f6a7e73. 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/QZRP52539610.