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 0x7c2835e67654ff79727015965179b18da70522104aee2584fb35e44fc0a73b30. 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/f68568b9-fb9b-4d37-bd06-3b13e406243a.json and https://artists.proofprofile.net/proofs/artist/f68568b9-fb9b-4d37-bd06-3b13e406243a.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 0xd2b360de365c4daca909c7b086619a1e3e033c3389cba55b7a232bfd8bd68078. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZTAZ2307245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929fb7343c27b0e013d5635f5910e460de11388c9b576fd81deda5afa3e92c4f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:37:26Z), 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/QZWFG2320143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d0e7d8fa9f1a324e6284ea54055004169e7db7f7ce50c3b3cceeb8c0d7c1e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWFF2308753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacefe948e33c125ef4588ecf4782775f744d13f5c11f89345e76ffe9498260e3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYZ2485435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff396ff3d5499b674dd2db9f7b53ca6757c85bc522782ab7d403f95d6515f944. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZMER2453627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552280d1fbca4dfe007b3fc82070002661dc7d5fa6ff885e27f0c9644b603e26. 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/QZRP42484727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2801dbf906119a33d1425cff3a46580562caeb64d333329a4b5954b7c9d001b5. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZRP52420152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39c75a43ed02e801cd3bd1099551354dc21bc76ad51ec3f5f4daf8cff65c321. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAW2414057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1425e4a2fb90c69140a924339d53e4c4d4735f537f18a2ed863038c245dc6567. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:46Z), 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/QZWFP2424685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8553535ce741c79d10e4dd95159b2622dc744f24ef34a00f50efb5c5f82ca3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFP2424686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a54eede6fa79e985b0b483cbcc21b5e44a6bfe19f38c14116fc9a1170a2ff41. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFP2424687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade6d926666e0859ada032f437ea4893235267e914251832a404338e624b4585. 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/QZWFP2424688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e1e79c6ef9c39240cbe5c2ce462538e9312ad36b0e78ce1a9076eae063373. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFP2424689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9832cb7c65c23c2cd831b54d048dfb31327f721851c42e49e1535f7cf3d93d1d. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZWFP2424690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872592d44c6987536ae4f34e4d9523ea9df2ac8670631003c381157075852f59. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFP2424691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c5314363971c6a77b027b58943d8aff3c443c98a47840fcf177725c7ab9d76. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:28Z), 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/QZFZ32579951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1216dbdcf367b90f2a444ac7fca585f5f5ce455e14e729ef7edc1d0d24ef95b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZDA82554196.