Year 197 (CXCVII) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Magius and Rufinus (or, less frequently, year 950 Ab urbe co
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 0x15da2305ff5ca35281da886e2c04b7b4b144c0d9abfae7ebb64f1eecdeceb3f8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86888b7a-3ed7-400e-8580-513b1639cdfe.json and https://artists.proofprofile.net/proofs/artist/86888b7a-3ed7-400e-8580-513b1639cdfe.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 0x79539b68c3f92c361e60582001161d02e9be17811bbe38791f038ed47f478b04. 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/TCJPB2450907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2e5fe33605e82ce0e43879c844a9a625480d85bcc0734e223c345db722c42. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:47:07Z), 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/TCJPB2450913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a8b1ab7e4df9ace8eda15321e152c611068aef491993e3f6784336b307bfcf. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:33Z), 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/TCJPC2445681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9769c8133b2f523a77275ec39b52524dd8312bcfacf1891617e24c0028d0a69. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPE2582395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d511362230ad0d502c1c05789c7b469b81d057e5056d9587e0006cb58083ee. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCJPE2582066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2981bc987e3fecc90af7cf968fe9632f33ff14f1e0f7ba75a69c260422794fcd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPE2582070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb4cf14b92959b204da125e60d21f72cdaf9afc7645cf0911a1080313f0ecfc. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:37:02Z), 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/TCJPE2582077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa6ee925756188cd61221457d2b03b1988b3e2d6922cee3e4f8b8f0d37af7da. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:26:20Z), 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/TCJPE2582105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc43bc8efde3652dbc349d9d2f49af9441caaed8171b10a0929ab3af7a91130. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCJPE2582208.