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 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 0xb90c3271fd2674960e7d4ba93c1ef96529786a2f38980335ca796e32c704cacf. 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/4ad68525-7473-4ef1-ae26-a5eeb57973e0.json and https://artists.proofprofile.net/proofs/artist/4ad68525-7473-4ef1-ae26-a5eeb57973e0.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 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 0x0fc3ebe5430ae132aee478e383a950cd3560d7619380599badbc8054aa3bfe88. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCABO1367732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59095d7250fa2298532aa6fcb09a9b8d475e6c4ecc4eb0ae0f15033556462cd3. 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/TCABO1367737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739456a18fbdf09e2646d3ab7e951ddef798859a34d57f827bcfd69fd69e8d45. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCABO1367748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02604cef5401737c6fd4fe941eef17236dc7ef58ce8e3d28863528e67cb8591. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCACC1461038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02604cef5401737c6fd4fe941eef17236dc7ef58ce8e3d28863528e67cb8591. 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/TCACC1461038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed882e0223063311e42b6799a3e95597519ba82a2744b18b84c771d2b5adaf68. 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/TCACL1503461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca50cd5c8bca89c0c9b45c355b71b4b6646dd7e9135596714d5c7b095a1c1336. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCACL1503462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8623a6fa6620b3262e0493aac2013d65a6763387566b0560b5260993ba99a2f4. 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/TCACL1503464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3adc85b0e4350463dc847d0cb834f6467ef37002bccc30a795043430cf860cb3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCACL1503426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f706f980e235d942d86739f9144cb563315e9bd8619f9331342e04d11d07b6. 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/TCACL1503454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8623a6fa6620b3262e0493aac2013d65a6763387566b0560b5260993ba99a2f4. 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/TCACL1503464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c083746e012344766417c8f171e748b5c6f33d6bd88c16f249238ea0631e7c. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCACU1610892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd4d9dd4b4250d30a998958df2653b0dbed29a237c62afe679c7aef94d69e3. 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/TCACU1662102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde29d6f3b9c2af657a5390b44b1c21652fd2fc182141472b8a3aa2ae765db1fc. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCADN1898113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d1846d2e926dbf8fcb1b20275a20a4c1367fda238829015ed317084b86f396. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZGLS1998149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5995df57fdd619e1b7d8c59acd9c5e1ad14f8c1dee1e898e5951c2c03df2f2f1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZGLS1953190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ce09ef60f2dec030ff571b2aeab52657ec524a4f14b9083a97fb4bfa5044da. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZGLS1998152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e239998b2255ef291d9cb6cc367943feef6fbd420c14e87936dd1599d2474c. 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/QZGLS2099902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cb9fb40c186b67d4b5c11fbaf583a3e0c8ce9dc7b13a1803bcb0a8c163d53b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHZ42093279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d5ddceca57a4d66c6c5135ab5027f2607da059326d3e283f0e8d3c28ea121. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHZ42191317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c9da33f4c34e578a419a4440004a8a59a73e2701788f1d6b23f7b99d9af08b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAGW2313464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839a5fe2c33df90f22611170fd42142360e82f6f0240a79ef3b366a86776cdcf. 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/TCAGW2313498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a51e4714b57adbf84e53b64f43964c25f13ff9e838971f7d7d85c09d0044f4e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGW2313519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f1b4500fc438344064c9c6343e61377a8e8afee9445e384356b08b1898ea3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGW2313534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bd4ddb266b7c580377bad4a12d6c247d7eebbe1710b8023585ce12f7d1f29f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAIQ2422257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dea5337a1423cbad145e704507f48e8a68a78a9de48c25fc05ee5ab2c069b0e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/COSO12000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cab56e3e948a554d78b6e1e32822eb81fe9eacfd18126f49dd5afc7763e6746. 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/ES5702100428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c927b4bca71f521dc5f97d080de87437a101ffc24e6ded17aafc6def6e57dd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G1631651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aebd7773bff0e64258fcf4ba08ca89f441bc99f50c1911955926de29484288d. 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/USDY42138580.