The Group of Experts on Action against Trafficking in Human Beings, more commonly known as GRETA, is the monitoring mechanism on human trafficking established by the Council of Europe Convention on Ac
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 0xa46294c3a7f4e0cca91b439c4dd39f3f1eb70965a80e932fde847e7c8c8939eb. 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/e63f7654-c4eb-43d2-b0e9-1186e47c0e8b.json and https://artists.proofprofile.net/proofs/artist/e63f7654-c4eb-43d2-b0e9-1186e47c0e8b.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 0xd4283161fa679939de955db594827d06e4263306ef800ab6f3b30e0856ff8ef0. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZDA71965742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8746b72798cc5a2d10944fa8a5873f8e360024ed2fad97eab6c603128ac68ed. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES91994280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d159de6748ca90550ef8df7bfca3fef658f1e50cbf2387b9d1f9ad78873275d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IT0731100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492685a09cf657472950b6aec9b8a5c3db89ab2adebaddd8bcce261f5150782e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IT0731100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748212965c56b7045bc267bdc8b1be09011edb659c5d900c47e95285e9113b66. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IT0732200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8196642ff90a320231785affc74e7127d96eef490a8d96d3546a792a69ad34e5. 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/IT0732200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4925ebe057fe721090b48818c1485b8eb907c29a878f8744d077c018639422e2. 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/IT0732300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a68ebc9760dc9aee8fd4c71dc850e039bbd0ffab6de800182a32575162af91a. 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/IT0732300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b1842b734839f02515073e0de8a96a131043799524dd49702de9bedce1534e. 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/ITIMY2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a68ebc9760dc9aee8fd4c71dc850e039bbd0ffab6de800182a32575162af91a. 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/IT0732300174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7f338ea69913027e7a5811a704dbe9e7c47f73d22ddcd26c157dbafaa34701. 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/ITIMY2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28fec7acf338fadf117539565673671548093516b085d935f61cdcfd75d0902. 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/ITIMY2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbbf6473f2cb1ddbf33b91f9772f43ca27c4a65890966a03331edae6744d324. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITIMY2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076a3b66048ab30df34fec90b5514d031e3003390b7c5672a6897a166bbc0159. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:18Z), 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/ITIMY2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c0cfea8d4135054e225274629c6e7e9ae6cbac761a33d48c04b46ff7b9f32a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ITIMY2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddddffb708175f7a3e3ea2edc84eb90f83bb25496921a45f8816623c4a281eb. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/ITIMY2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df480fa4fe4b0d83d0434434cd0e225a761a0f553287bd490801c974f3c44e. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:02:18Z), 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/ITIMY2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a318063dcf6de4c452319251a9a8da0e3026e44034561eba0cdb93430f17f37. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/ITIMY2400056.