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 0xeb82dc31c089bca24ca45cb58ce67359588ff394673e3941d27956c8b025e03a. 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/876d4da7-d518-4f27-9fc0-096ac9433609.json and https://artists.proofprofile.net/proofs/artist/876d4da7-d518-4f27-9fc0-096ac9433609.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 0x3e8e6b8c626bf7f8dcb07342390042bc5eede8cd27b4e10e246837c0f72e502a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5W32306653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bac40d09267e4fee5161c2220762c069408d00e2065e6f85257286b3f07ab1. 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/SE69N2413907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c808ff37871d973adf18f005e4a8fa91ca649346e589486c8dd90c6d8f6374. 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/SE69N2413610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e9eb954e13eb36e02c803a8b5415deca1a08e98f2547dd37ab0d25c8cc3c92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE69N2406014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3084dd900018712c4d447eed4a77cfb55446b8fa7f31ce23c5d3228051459a48. 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/SE5W32405737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61921037d344f4505ddb190085695568431e9a864e2ee6fe591ba68183a790e1. 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/SE5W32405372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0512af181ef0fd2148b63ff3311e8a65e5a4f29583328beb38ca6c00b8ae70. 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/SE5W32400582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f37caf998dd3c0e07ab10c629ff49c3015d6e74669b3cb703157aa536eae5. 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/SE5W32400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaecb759b5e00f49ce986463cd5f3ed4a517fdbfb19fc0453bdb25ce51780ae8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5W32309804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b0c53d3babc90045aa40e3f70ee4d08f16cb4ee058183de78a6230adf149a8. 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/SE5W32309374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43769b844eff5ac3d9bfd8cdf071bd6672fb5b42c86e90eaaa094cab8b74b234. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5W32308815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18b6435ab079dd8f51897ec805d944a3f96ccedcfbc0f2453a0d80e39a79816. 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/SE5W32307595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbdfb3155f26febc1b8e2b703e7c168a52453b11fc30f796fb166920964021d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/SE5W32307594.
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 0xe76a4ac0f5b1ebd593d3ac860d48d3aa8ee3a6dc0a96d4ce5c69d9e12c06a5dc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5W32306038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268b755e083e2c3b0cae5dcb6c9fe0063b1f486aa2cfef0983e47fd3f173a59. 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/SE5W32300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1922a6d1a9336b4b20935b40fcda28aa72038b188b884e079f83a410436ec6. 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/SE5W32294664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb1887ca476b7139a33a2c7e7c7cfbd602efa4462a434488c878c88cd571343. 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/SE5W32204496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085c5cf5f932a2ee7aaad40f649efa77f709db29ccebb4063ada34aa0516cad1. 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/SE5W32204497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28b0fde21d8286b74da953821dbf85c5e033c67aee35efe53a393a0194ca636. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5W32202972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463174d815afa70f6443db00366bffb850d6ac61d4af220039cc5f61519c3f1f. 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/SE5W32202973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e281d4559d53af9027103e498a174c74326b7241ae2dd22a55d04b072d0fcf. 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/SE5W32202645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f50018c319e73716bb1effd5561d4eb885f00835fd19d40325083dce7dd9982. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE5W32202646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831705b5101298437a3c08b27a58f856dccb76744bafb83c98efe82fb198b5dd. 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/SE5W32202237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb7dfbd92d9b14cb2311c156b23c29554feefc43740adced8ff3b764f8e4f7e. 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/SE5W32202238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d79e52a7b0f8eae1f4dd2fa003f84968e7eb48c772e6d311d992a6744d617ca. 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/SE5W32201707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4272fdac3910c0abb4cabbd51e27f10ce99aa8290aea3a30d7318e8f2b52bdb6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE5W32201706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8a413243b692a3d37e0ee9b749354adae19dc22fbcb3dbf19bc5eede3d7c61. 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/SE5W32201164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2469fbd9c5f8e95b46d1240032c2b84acc12d2fb79cc3075af22939049973fa. 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/SE5W32200496.