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 0x6c5912db0df63f085dc2357a1264f25b2c46847a534bff05f82e8869bb821203. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87cb6a58-119a-4fea-a8df-258dd3d95123.json and https://artists.proofprofile.net/proofs/artist/87cb6a58-119a-4fea-a8df-258dd3d95123.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 0xbcdbe8d68133bb0fec982cf867856bd15fce06a607fc9f5ecb9b8375218fa153. 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/SE6I32186778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4b872455e1151d25a4c66901fdd8739860e672ded09c292f92dbd57838bec6. 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/QZFZ62117289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63fdf294544c36659bde66b76db2309957a1aa3eeff5b29a83b07f55ee000aa. 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/SE6I32186781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a04258be4f8c664778b688ececaf2f3602e3f450f94faac867b4cfacef80b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32186783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1bc0ac6eb7092ebf474ad5c3d6a3a9af410d8abe5f1af573476635cc59541b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32186786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdda097ca668175e331734b3ca017c31fc3a58d7302ed25ead98d6582d7df97f. 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/SE6I32186787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e547f4fad884ad01b6c1401d2c0a781887c20935553a6163febecf94d1fced. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32186788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa337458f5be2aca7fd6948d19d4108cfcede85115448ea74c690db28846acbc. 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/QZTB92207620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1938d6621743088204f49d29152f49a6cb4b115ac3ac129fdb20c16e0d61c62. 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/QZTB92207621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8487b1f45c313e89278d2070e8424bdd4bd3c9656b62249b68bccedfa6c4610. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e9c87c26f2412d0e75486283d28ebd747e7e16a5e4ffe8ea18ed737a00e6b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32599de27ce3fd5bcdee6d9851dae1c8128c2e60fcf4a4ac29daf816042c1a8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6500be3583dd1cc850df17d0872475b570eea9e728a8e18c7657144855121f04. 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/QZTB92207625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0201ad7957c9faa407e8ca8f899ec47d6361e948733ec710a36abdb34b522160. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4766470b1c06c9d29681d506445e05f9108fe56a43ba26c6aab557782d55a134. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe53bfe59c2e394ae9ed0215d5b940eb61200aded1d1a0d6ad58c656c7d2df66. 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/QZTB92207628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca255d34cbd2f3af336f7668c9086576c4dfa58e95e20485638963d63ee3e29. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e0af88ae7214282a73d25d57a2ba10a431b34ce215d44cd7a96422c43536d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB92207630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2feb2977bfa579d696a044a30c8428920054fb8fba88d13eab219bc2c4717d. 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/QZTB92236793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92c05e7a52c8ba4f2474a065de92808378cca53f884d48f12d8892fc06e4a1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKW3Z2402633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833aae838560048839766a962e615f0b47049cc3c8a014663fd3751906f8561. 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/UKW3Z2402634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729acf23bad83409c345470275190bf7baff4265faa7df00f14ccbecc69deca. 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/UKW3Z2402635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac6a303345293344b84debb78c7239bf4deb9648058fdb147ea106c3ed418a6. 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/UKW3Z2402637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c950f22fa7a29c2fb753f4d78369621f07315c6c1437258059f67668cb63959. 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/UKW3Z2402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596637adff570cc93c2fbd132339b62a4b774bc9a340613582dfa8668f036a13. 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/UKW3Z2400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8407a223ab9a023461550cbe045c5df42be29c99c51d1445f353bed5544f8e18. 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/QZK6L2094849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fa40c81d2b84f26c87c05a77316240638dbf60696417b0f34442aade82ccb4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN41959864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe017aa08526b8a0045afac20ab561565c4d119932b7b934b53b46e6a29f70dbf. 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/QZTB72324754.