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 0x529d82e627f6f989435383b3b1498c541abb9535f820f8551837fc73e430d955. 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/f53d8caa-ff50-4957-bd69-61be0f270e9f.json and https://artists.proofprofile.net/proofs/artist/f53d8caa-ff50-4957-bd69-61be0f270e9f.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 0xa74de1e54b1961b4b1792e4defbf112c52181548d46da448dcd24af61a5e26eb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2242273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f0f47cf210d16512d415a06042edff391597707b8e5ea75ae15dec442dd033. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USANG2242277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef2b400d003ad4e88294da9db8c95c69bb416bfc5bcc6ce53319947edd670a7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72323788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c0d9d493a23ad2f9645c23f0ef8a2b2393b4c321865aeaeaf34928a3c6d40e. 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/QM4TX2439822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9a03c2dd23a5b0128a3c664672ad1cf142b3d12b577b97931209d6a16f104e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TX2439790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7633b8a643dce3561651430315574ea1d91cd34381eabdafb6a1b38356354c. 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/QZTB52392890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf763a8cd8b2ffcf7c917512c45ba3e20045c5ebf17edae26a1babfdeb9863942. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTAS2324646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ce6a1885035af58a933a98a3818dbec3bf4300d441ea652b665e2afc75ebaf. 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/QZRP42365892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d114d91ab808bf482905680625e7f2bbcc001df9dc19f0a5eebb95003de1ea. 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/QZNWZ2313835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7931b799193339942e97d0ae270294d887e5251dd160fd31448628eae1aec475. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWT2375230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c76abef90d48a0ee3ebf3117abda9c15036ee583076e8dbdfbaa2bc126847b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2311637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0885c1ff7713075bdf88a07f72df80a18fbf88a969fbfdd919c6cf184f42ae92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6H2344140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985d3f8c8b0a6c22d6323d31cf8e8a1bbb38013e28858e8c7ba9581bcb026300. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2381955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda4056448abb0dfb1a32db669abbac5b7b9992baebc77481d2e7d8b0cb05525. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6N2348513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400bde74ac7311d5d18d1babc748804e628a8ecae85963b5cbfbe7e508cdc0b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZSYP2242407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d201bfdccde843f285364dc472ea19d030a1f709d5beee62f77a8fa66e6a67. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTB32275788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e1790c023370b6a1e895e39dc8cb42d41c6f951d6d97ec6e4403671d2d4516. 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/QZK6G2229104.