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 0xaec18e0a76202b7aafe27bcd96b2cb7a693011fce351c11677703ef4d3b36112. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91827d70-86e1-4249-ac7a-34821ca9fd49.json and https://artists.proofprofile.net/proofs/artist/91827d70-86e1-4249-ac7a-34821ca9fd49.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 0x86f7f8c734b894f8463d7fcea722479040b2189e7ce034ee856530a48997e29e. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZPLS2133848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b859cdb580b835bb420985c05a892e874c2dbf7a7a3b85421bd1cf9bfd6c90. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZFYX2228786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe993698d5b3caf39d3ed7100bddebfbce77be5c1a91b5b0f801d3011b8942. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:32:15Z), 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/QZHN92236558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1beac5fefca230dcc83225827f63649d6a762552b0e6a417329c7c5b807ccd0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEQ2252796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3311685c2a82c1cdd2c7af20ac2979fe96e0aa493fd79d5fb0d16a6ba957dbb. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAU2294955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d089ee4950c430d4d1c71c56246c8579d8667ee27075fe1d54bb2f80e62104. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:44:09Z), 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/QZDA52374954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8183b9b09610ccb37b938f0e74abed3d419021ec9cbb334c261490e6b4aa91a3. 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/QZK6N2312389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff80b9907867d5a8e7a67059d0d50b8b4826bc68a5b787c317570836343c06a. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:57Z), 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/QZPLS2374059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea441b3bb7701c46c38ce9ccfa48a73a1b113fbfc3c0cffdc597792b452f7f76. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFE2336668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab68481a6ba086b1227424e1d23e458cbba9cd18894b6942d288eb92b6ef9d4. 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/QZWFN2351215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b30aef6a6115305938fb6f2a9f057ebe48e8cd8ac13bcaaca0d4be12eacc8f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZDA82423015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0f3a39843f0b28e3650d49c4ebd9be34d2a70eb73a994ff474e3fb230f5515. 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/QZK6H2464158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c807ff913d9fdb01a846050fe2a6f3c78c0e311f3a19da222520e13150644ab. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWX2462582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa089cec11f273315f6295e1f5556a1eb5b01ebc07986cc165417cf340a62f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZTBB2464441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4623fff55568c65a5e1a060df3720e362d09b34de61a6a85ce60e3e296ff98. 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/QZZ772477420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc426735c4decc62b44a3087437c03c6427885df7c31f6a0dda0999a0aab786f4. 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/QZZ792419559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecbc15dbd0f7aa1f83144b86411dece22b3b4ac06a4015e90cf80ed5ddb91a2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7M2433900.