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 0xb513e51adbbae5aaefff801944538f0434d78319d07ab3876beae28ddf625770. 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/f9cfe064-fe88-45dc-9781-d63b7ecc9dac.json and https://artists.proofprofile.net/proofs/artist/f9cfe064-fe88-45dc-9781-d63b7ecc9dac.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 0xd9f2dc00224fd63d7b21143b18c9e2628d964dc936494034453b1f7a7c624566. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/SE6SA2050266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8338ae1449610656207b82524ad78eb1ff4b01c28e767fa91dad9790ee98f7d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:00:22Z), 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/SE5BU2164962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92db89a857eaf2bb8cff6b2c02d1a7d70741507c3688cb719d69c0e7967a5338. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:23Z), 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/SE5BU2185432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bd5bc8f079caf5bf00f15bd115fabd97115d7820cb760c8fb5ecb0373c08e3. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE5752129823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba372fffdfe00f1a1b7b0a76547716ea93740feb57eb1f61c5994e8c4ddd4c2d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/SE6A92197016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037378774fd965ad41b823a8930b9fb69856488ec62a75e8eb7ad331f4540ec1. 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/SE6A92197021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94028606e0fffa89ea9e5225dbdd5899cd68a2a6666a8a6c7c91150422c782c. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/SE6SA2100772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf49748e6677e768067c97df27281372fa7fd4a1cffdb2606228388aff15037. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XX2184710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa447eeffce544eeb814342473f3efab37864e109094c6c6644a5cb5130bc2ef6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE5752285965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f4c17289295cdaa78d016ac2c05cacd4802f312c65388d247936b800c799d3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE6QE2204353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480e6ad67caed631f58db5e830ebe43b625e024fce380fce1d780570a038367b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHI2368633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e45f28127d00e8541b6b22079720c8d2c5284c7b6f6d3b60d548d013b28314. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHI2368661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8021280d1ebb9c3150dc31a380702613657e213cffa335a67c7bc54f45c478. 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/TCAHS2399815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721134dc365b4e02ac95f90aaf5d5601bb2caaedfd243a8709e1b62c81b1b434. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:31Z), 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/TCAHU2471965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb37e69b7c19bdd8c3f6bef2055004b638fb98d54871e991397ab286ea17b86cb. 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/TCAHU2471978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab948703fcf254253e24d0725cbe7a44d8f22e2a0f8da86ec3ba37302bf2081. 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/TCAIK2438996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c11a9f68a09b4222af0f9c99e25eccb69e0f09c3d1c0149854085e2656e0a4a. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/TCAIN2400137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bddd9bd53af6acf74cba1c3663b09645f65414d78471dbf07aaead0c95cd25. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAIX2438916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e42062e7ce3dfaf0fd8e1816205297a86f7a904a8c69f05f8783eb3891d3c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIX2439003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125f72b3aef821cb818a48669176e68b96abb84dcada6707d983ac02222d9ff9. 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/TCAJC2443920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0980a482fab53c8e4cf62a6c7688724070597006b95e75ab570b2fac66bac31. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:10:27Z), 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/TCAKA2580781.