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 0x2a3183b8d05c2ae0ea1b82263306bfd0988a100b5fd5bd5312bd0c564de30f6a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2d7245e-0edc-4144-a15e-2fa70bd8818b.json and https://artists.proofprofile.net/proofs/artist/f2d7245e-0edc-4144-a15e-2fa70bd8818b.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 0x0cecc4203d82719a0448c021383ee7d158b5ff447d50bc6d3e4c22cfe9849983. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTLA2461399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da5ed85fb1de67c74992562bac7b147d08ec5181b05d99044d937d74d8e626d. 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/QZTLA2476693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb5cc72d94e65c00bed6d72c78cbc92ad9d97ad7915f16c7688cd6fe5ff82bb. 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/QZTLA2450615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ec8a81788ad6f61ab090092849d11407a54f882751d3272bd3d2db52e23265. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GB8KE2417041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef7589d8307dd0909c41dbbf737f634fa480192ed8063fe261722339944bbd0. 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/GB8KE2417042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2e8450a333fe1ef1de5d4f9d3256ad2d02fdc93c7a54b3f67d5e6288796bbb. 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/GB8KE2417043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7450fd243003de117c576be01e75d32e5dfe8743c137afad7a3e25a4f957671d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB8KE2416043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311d61ff4fee205bab50aea041a74ddf112ca5e8cb49ac85cd86503b8a3e02b2. 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/GB8KE2416044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f321eda7398703f1b15b64d82e7b55b8a02a595017edb7e294badb8b90d72ea. 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/GB8KE2416045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd487e90d64aaa9fdf83cb29d0d049eaf97d2532294bded80f82d4af04493690c. 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/GB8KE2418570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3d00ecb9d626defc11f8a001da6a282caca201351f62a3a9dc9dc17939e19c. 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/GB8KE2418571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a14a85593ba891b6993c13a965c232ec319c90b30849d3c71b09d49cf1478. 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/GB8KE2418572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28f62a54bb475f2b41cf765ac52b4da561c12c003a75b53339df705ccfe1e43. 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/GB8KE2411862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc26551330af199966ab2625bd813f955131c9f0bf67b283eb98264ffc6fd69. 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/GB8KE2411863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc472a4c76435df24417c6fb5e92393e828f937143b9abd950473f1a115cbc4e3. 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/GB8KE2411864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2aa888e05a0b55b49a0b7be68ec8f625a760c6e3fb4bf5e83a542753c82749f. 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/GB8KE2411183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e601754adbada0cdfda821f62248ff03e6c565b874a13ade94d5112b171011. 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/GB8KE2411184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51409c03debf5e212df232e62f73a6a514cb6314fd8399c7431cf7b2fdb35428. 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/GB8KE2411185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3fb1dbbcdb0ebd49004eca38a84d4ea3d3fd8c98bd9004fdde16219d26e6d5e. 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/GB8KE2413300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd6be4041bb32e64b2eb0c659f46bf89d2eab5dafb4ae693839400786c2b4ea. 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/GB8KE2413301.