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 0xbdd42dd040ef57f138dba7280311f6d8fa89a3532c449d389055e87d9959df9c. 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/b7d723eb-768c-475e-901b-a323f957d12b.json and https://artists.proofprofile.net/proofs/artist/b7d723eb-768c-475e-901b-a323f957d12b.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 0xff439f088508f201a664616a1609b9022c90442880566b31f3a200ce97b276be. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V81500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b65d278be6a20db7db759e42e2637bc9e5b2c99056794517023c8599aca734f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:31:12Z), 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/FRV461505002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dddf0f2a716f626be4c27beca7a793655c8b6a23625a687874ce07d929e11f. 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/FR10S1770859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45188cc7e5df16adf160413b38f874ccb72ff7a450aa25d7513615f4a436fd20. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:25:07Z), 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/FR10S1770860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822910de772863b8a4fbbae5ca902a3c309f2d86dbe983a52c8759b2adfe44dd. 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/FR10S1770862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5796d5c83174f5b27fdfd839622ee196d9a23970f442677f8703f2a7df567db2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:53Z), 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/FR10S1770863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b24e4b9cf4987bb43d5d6b0c6b8e3df9801172b950a74f29cfbb7d5040aac54. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR10S1770864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab601bc1c63075f77bba830a42f2aeab4fa575c5c80a7f0fbaee9904a3396ac. 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/FR2X41837490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c4734abef3321f166b2a26717e0c490ec92218b283c8b2094122c44deb6180. 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/FR2X41837491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435402eeb7e588d0b40cda2ad6d169e728a19ed1cbf35e98e6d41d91ffec2df3. 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/FR2X41837492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c2be78fb5034f2eaf9c211ba6abba97d651cc14e4c9856381fb45f02a028f7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR2X41837493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fa7163dd58dbedc0aae643a4bab464cb6ae6f65adae3f560965e84d5993bb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X41837496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562d9e8b72ed291070853f41c29d69b36025e4577d6df630da7c67b182e06c91. 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/FR2X41837498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3167ae4823d63949a1ab9741bba91c1f327765123f219d853292f9a0271c3a. 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/FR2X41837499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035ca84b0ebf9a38249d76c7277b0a1703e0e6a65b877086914238a7619354ba. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR2X41837494.
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 0x178a0c8ba2fb15cfafa892ffe5968ee8f547a613cf9471a7164a91c9f7f3b3f6. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR2X41837495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb043cdc5f7e6015fe75c162463a65c36da4404a69dcef62c212a32e95934f9. 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/FR2X41837497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaaa4106fe62a4b935841368890953b7afacd147c8d774b1e0bd5fe93dde4243. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR2X41837500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850ff6571c21f9876fc719599eef9c4b9e419a44a4c6d8b8777ffeb7bbaec8c9. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DGA0L2324309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefc96375dd8b7f911aaa33542484be7ea65f547b14f32a89faac18ca98a836f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0P2320417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ca54f3f06b4d5b701c7e104ea3f6e3d07ef6ac8c529de82b6b7d38eacf3571. 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/FR9W12218343.