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 0x66151b9e79b44d548f2f6fb5209303b784781be6b1b08a72976efcd7afdf0a58. 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/26c85734-d246-41ba-a46b-28a99ed1b51c.json and https://artists.proofprofile.net/proofs/artist/26c85734-d246-41ba-a46b-28a99ed1b51c.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 0x54aa18be3798e18f358156ca6f52a28de509ac1d1b90c206ac94d3fa3822b99d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZZ7V2484169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3b51ee1bebdc7c09c075e7b031bbef5a6722801b945c1fac002c5fd2901055. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZZ7V2484171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f520f7b6061373808dba87ce83140d0c006d1ec7922bcda73bfe70e24351788. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7W2490613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc5ba6dfd94dd21d18562ed655dbd2757f71c797fb74c5ced4dd6573518b8cd. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QT3EZ2494730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7b0d6a2a87d9d17d8689dfe32a7555316261d80e60c4c7d93f29bf37a1044d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22538956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b328680f07f5490ebfd8e784ebde584972945fe68e0b8db6e630c9414b7224. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZDA62525603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b53dd7bc9ade5c4393f2b39a0e651e31d7ebc569b7fdccb585b097a15d992bd. 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/QZES62501016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed08b81f831e4a5dc9373d2f81f522763f927f3ab28cdc437293620cef820960. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZES62501019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400d37614ee09d0f9392ba47fe3813fa98ab2387cef9d2b629122a30affbe651. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:53:13Z), 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/QZES62501020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dccb38cebfaf402af20d439654804d5f6176131898794f0d9adaf122b89c69f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN72509763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020d43cacc123d160d0199afdc779406210c02f46bc414efdfd7094e5b53e8e8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN72509765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595ff5bc20818bf1fff40d6f15f07d57aae60fd444fe4239b159d13dfb5b5079. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZK6H2546994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b9af753aef75555b10d20ed0a8c7bb3cd15cdaf4b0e1df95d22d9f966e6f76. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:14:47Z), 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/QZNWW2567709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e3ae83f7d5edc3ab417b9e345c01ddbe77699aeec82581bf10e9377b7bedbc. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZRP42595386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a06dd8c9055fdd3f4ce79df9267bfb77c2b143a10cd8d1a0a36c4f4e365a99. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:37Z), 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/QZTAW2581891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e5b079ac106969ffd96cf81ab7bff22798d17277bfb1affc25a278ae430c27. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:51:19Z), 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/QZTAX2529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b35b3b6f7b2780da4b7692dd393faaa6f2a369dd7b964b78a74d397ac934d68. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB32521966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb384272f41c856f7f33e272320f2befaec7ff3317888614dd8d498766a7d8711. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB52522795.