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 0xa5f79c09fe2447b8d06c759c3d56b9fcbc411365bc2fcb4a1afb4d6e3f7138a7. 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/9b9b4a28-2d13-4e22-8dc2-42471570899a.json and https://artists.proofprofile.net/proofs/artist/9b9b4a28-2d13-4e22-8dc2-42471570899a.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 0x58cb4f621291d5f049d01deb169e42750b11f77d55ed1a2ade00d25e1cdf483b. 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/RSA222090101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd69313dc5071a511d0338cf11a98ac04068c6caceb8f15c7d1fc55379ae4274. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:15Z), 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/RSA222090108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac801148a6215c0458a4cf54570ab211810f51b44a5aaa139940bccce58a13a. 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/RSA222090124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6571e8630591f77917f818e93462dcf7cfc91e6c91f9eb6828ff2074eb137d9c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/RSA221991450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b35209bd19886f1649981e16b1c88aa76e7f1e3fce965565678f1c9658c86a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/RSA221500442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd695c8f7ab0ad15804ebf594993023541c900920c4c5b32fde6fca0a6bbb35a6. 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/RSA221500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8433c7e3df98af120d18438f2e5d2a23dffb9f437f65e2a27546ee68caabd32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/RSA221500445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0bcc3c3858b94121348af60be2426e4fde0facb890a7a8c8c616c988b04a82. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/RSA221500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fbd6c1e29eaf5031dcb831ad08429401543e6c8df35bb017983b89bba4299e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/RSA221500449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e5680d88e3d047e116f61350759c2eed88df41c2294c0d1cf1f8586558882f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/RSA221500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40781a98c0cb4bbf1ad957300e96fd8d99292d566a6963fc286b0b11aabf2a4c. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-21T20:43:17Z), 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/RSA221500452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb40a724a494f8a03b393212c0dc007c6fa5309c4790a1c4b612d2b0d3b87553. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/RSA221991464.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fb5b76baec0dd265e428dff0f09643e605e47bd04aefd309c13575f0451970. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/RSA221991432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebfab1c09da79cb16a9f5f980d73794caa4cfdf507515f7b4b38088952342e5. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/RSA221701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dca9fd0ecdb0e7333688cebc2197ced9b5aeb9159e8424b282ed489cf05da2f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/RSA221701017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74c870f790910ac7ad17029413993a8522a44c215950c2f4f2c422ef46034ee. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/RSA221601798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8d9fbaf99bd74205fbfdfbf4c43190344f038ffdcedc0c0ae2f2ab7a035a22. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/RSA221500443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdbc5806a59dff2cecedc02b4b100b70e22022e02809cd16d05e3d20d557723. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/RSA221500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f4e0ea2bf8e722cead68ebc59d30f71456c74474caa0731c0dcbd473c62581. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/RSA221500450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a914fabd6a2c9c7ff10443f2409d163b99487a27220243d8eeaa2e681ec9dd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/RSA221500453.