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 0x4a4a75342428c8d30d3221775515b3b9b0f77bed22e19e2905da9885d430fab2. 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/777c2347-be20-4cac-b0f7-330101abb883.json and https://artists.proofprofile.net/proofs/artist/777c2347-be20-4cac-b0f7-330101abb883.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 0x69eeea5ecf7eae7eabf6bc01578f77f1a9ca2b46263a16e45f51dee571a9ae7a. 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/TCAFS2125446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772ef8b2ae45f6822037bd4fdad6064d17b4eb5d878922694f36ef90aaf9e9b7. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/TCAEQ2054476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c66ccc25dfb87ffa3b8652cf6bdf1728d0c444e06f96fc5236dda02fe5df7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAEX2007961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c0d30cf59e0b0bdb18a7a7f77cdf8050464d92c40cdea90946283bacdefe8d. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAEX2079129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759157c16d11b38fc0fdb0383f9d67995d7e74e641eabb7152d1c73676d425ac. 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/QZK6Q2177180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1196a5228d2907c879e498d62f35583091c58cdca716bea2add41b4069aeaf. 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/QZK6Q2177181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234ac4d976e7508217ff57db285634f0069386af02c7e48599c983416085ddbd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2177183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d27025f5c3624f53727bead947bc9b0ec0e71d8a44ea30240dfb5017ff030c9. 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/QZK6Q2177184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1051cb3fd74a98d6b544a5eb20c0d21164d2496cc611d62a768f08cfe728bdc3. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZK6Q2177185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf1240cefe6cf9ebc8180308584f75495713e334f69a97852564be4e97029bc. 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/QZK6Q2177187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5e13ca33d50e82538f79ebe4ce8506799b7d1bb7525e2c439f9fd30694323e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2177188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0fc77d0751915b121bcd8bafa8624a6c1946898b77a6970fdda1457015d878. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6Q2177189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c58f346bd3cdabe6484126934a5675e39d56d04afcdd77a41dbee460a61d9. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:28Z), 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/QZK6Q2177190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c313c6213629b9f716e13b0378d3af54e836a1cabfe09143f82e8a80419fa7f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6Q2177191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8ea3ec1600671e876c5a2a9ffcfde35503469f018651d5906f035114068df0. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZK6Q2177192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b96454f085d5baae6c49cf6c50e4463d8354228cc24ec7028cdd8e3788335dc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIV2438566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a8068d7bdca764326c6317380e2b55a5f56c301192cf2b3482dda1063a0ff2. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TCAKA2511647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c0eed37c5dc624589db3e57c1a40c2fd48df034dea8d928435e160f4ea5ce. 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/CZA232001330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57df75e3b4a7cb99d8910e8bab2a41aad692893f14fad77b687ae733a1fea7d0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SKG451500306.