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 0x8132c7c2ffe781333fe290671d637013a8878527ef1eb3ce83c39c1afee95f40. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d329f667-387a-4e45-bba3-d76719cc9dd7.json and https://artists.proofprofile.net/proofs/artist/d329f667-387a-4e45-bba3-d76719cc9dd7.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 0xca9b87523d436fbaebb2bec27c779c43d306367e1a0860390a3b4d776325fc91. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5590900995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2635484cb729f97cbd16f5c9f11f5c29320f6f8c8b911aa343db29a6305f3d3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5590900997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ef95d01a2a5bae00ff17c6e15799df863fb8d808144f971c572ae0b52a8b89. 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/ES5590900998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b026429a1976a990724f9117059e8f9b5c06a82fb273d4719d20ac0cf30dfc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5590901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa766eb4fa946ce94d144eca3114f54a42f8b88aa5a6bf00bd77c303a0b35085. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5590901002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cde78112a5f0c258ed99fd607a85c26b08058d5a0c5df3fb896b99579e8901. 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/ES5590901291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d88e4f1121f7fb558bbbfaac535f8e2b1a905b4a333f9f25e855689ed817ef. 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/ES5590901292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b94cca1d7889dcd33ac9ddbe7d78bf332e2a286f305b89cacc146719e1157. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5590901294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5787eaaa56085539c8af63a143828b75bc110b4876a5e37647279f15e97f28ef. 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/ES5590901296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9b1748c0d8f3802e2b9ff735bba7552f8cd378450a7618c35d83c079dcc16c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5590901298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8bd74b67b2c1d1f4515f9dc65aeb0bfd797885db3603ed61aac0d78516b982. 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/ES5590600648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd628a33d7470609c9be08b31dd9434f96e7ea4f3e98f3666aa1f3cb8d856aeb5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES5590600649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469bb58235a4f45c4ab990882d01d69732d6db4296bb807e70d41adaf93ffc45. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ES5590600651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692c40d63e18d6eefdd8a1a6f0f87a168d3de3407793c64e4df898e410906637. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5590600652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfea114a0bdc6f65776e1218bd6789dc4ba66839ac8b2d473e886ddd2e8fda. 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/ES5590600653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8668be774fec81742f64dc7bfc21018984151367d3d08f683025e4765826ccec. 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/ES5590600656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d0823536d0fb27a256754a9edbaa225ee33b2bd352b63a189aa31c1be4cada. 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/ES5590901151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013088ac4d4256f3728b5edd6d04835600a44c5f3bfbfb10e43a36ce6194152d. 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/ES5590901152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe837f16a1dddc2b717fa7cf013422f7dad550c4a2921d96be51acf29eef9d4d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES5590901154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274a5d8089e24ffc871686b73146e20c7592cb8b953da876864804ba5bd5db7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5590901322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed31547f0156fa2025386a216439f11f40b0af670452cf8c559d021c1fa297d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ES5590901326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df92d5bc0c4ae332fb98a7bfe55fdadcc6328ba5fd4afcbe282e0994a994070. 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/ES5590700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f27b87c75f4dc38ef768de14c2f257a981b102be6f8b62987d70fb35e80c00. 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/ES5590900882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2066a6eeddc5ea033ab31eeaba2e296765b15abfcafaff511c75aa7c5ff32fe. 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/ES5590800731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8bd74b67b2c1d1f4515f9dc65aeb0bfd797885db3603ed61aac0d78516b982. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES5590600648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79acb8b85b990255c04032c6ae6d4e8196224e373ece76bc95837776ef6909d7. 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/ES5590800557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef98728250cdb24c03b9b1440092f45d0841ecf37def4a73367bb02993d2630. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5590901557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2beef27f1d0d7ec3e586f7886e56c8e72da3f8631ba4facd2bcb3e807041a50. 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/ES5590400457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8668be774fec81742f64dc7bfc21018984151367d3d08f683025e4765826ccec. 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/ES5590600656.