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 0x7e9acbb8b8e0560140a2d3597a3110528529a2b9551193bdd215bf424242f410. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bdc7d4b-3291-4e4b-a45e-621e720d07e9.json and https://artists.proofprofile.net/proofs/artist/5bdc7d4b-3291-4e4b-a45e-621e720d07e9.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 0x253c8f5138d44675ecb2c22267fe523f62bf12da10b1c41f05f7e01ae944a2bb. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAIP2465378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093509ffcb06863a258a335c23be16cb9109f38d5e1180d0f3c8ec3c71a526eb. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAIP2465395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc868673c4cd272c98fd24b271dff6cd5180baef382c66b1ae40a2334a2c3b2f9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIP2465419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7d0aa71493817921f0771fa5f6b5b578fa4af28aed2fa0c0183f78a3db511. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIO2465437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8761335c3719b3cde7cac755e42210c6586ea7b974a5d1aae62c13f64275f682. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:00:26Z), 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/TCAIO2465449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf111d7f9b5c3971896ff6351f7c14402c4ac84993aaca07ea8ca51cb03bf30c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-21T02:00:05Z), 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/TCAIP2465500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe748bfe5aefbe65a1cea89a2060ad6db8e807c61f4d17f0734938930503975fa. 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/TCAIP2466478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b1e29eb4c863f3781110487925298a8783faa5e9dad637cccc33925d728506. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIP2466508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b10dc0af2426c440da052d2cd1461c8943102efc8fb569426be8c3269ce3ff. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIP2466514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3938678b45272fb9d38dce9d381c5c5593ca66ee6ebcb9cd804af8cc24f2faaa. 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/TCAIQ2484650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7474af8e49c0aadd851593a2a2bfede543e08d043b41587eeab6d637063d8373. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIQ2484652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674dbb8ee956f38fc0d950d8ea8acb9d56e38e88cc9b781d53bf05c86239ac5f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAIR2484693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d6f54e8a63edf180f9688c93afa298362a2d32a3e3b4f10cb86f082e5f4f8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAIR2484704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b91d45df36f4643ffeccbd6245c2791207a7e7be496e3b3a86dbd50e3d62c27. 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/TCAIS2412543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c9070ef0d76b9f13fbc240d02c842f6b34053dc318b905a1d6b5d95f6dfb58. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAIS2412568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f1b4f3ce6168eb073c4711b2bc2e185e86c8c4c17b6f123cdf4c8a3c0a62b8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAIR2412629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50ebafc274153555296691eca27e16cbfce07d71d7d552cc0b3acec94025b90. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIS2412645.