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 0x9ed62f6cc218a1a80bd8876f9f8fdce3be47adff6434446c551b65644c25bb19. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6e1697b-24e4-4b7f-9353-f97e095c83b9.json and https://artists.proofprofile.net/proofs/artist/f6e1697b-24e4-4b7f-9353-f97e095c83b9.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 0xbc54c556448e6ba2e1a9698ef4009db9ab65591bdad60064566e5e0bed346ada. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6G2032768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c0eb0c3a4724c55b5a1579dc37217dad472d232001c760fd5f9337b8854da. 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/QZZ7V2434464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215c0eb0c3a4724c55b5a1579dc37217dad472d232001c760fd5f9337b8854da. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ7V2434464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efc52a4ecdd702007fc7b58ce171ada970c07cb4234e402c189ae9c93d5f144. 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/QZDA72572626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe956b01909f0431e2c8a34e8b548266989e5cadf20f0a1a59312af5a6c87521e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA72572629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a21c0e90053f4da8a2f0ba71fc87a6e381567212b7aeb1f032d45d2338bc6d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72572631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02907df8e8bb60a3562b585abee1ed46dbc7be92cbf13a050a0ed0a0c4740973. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72572632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbef82d4c427531ef21c667ddebac45b5c5182d0422916cfcfd58e9149092bb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72572633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba046a2b8cd530d8ac0306205b01ba2bb1fe09a4204ad6e5c886097a182d18f4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDA72572634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4e9c1185640ebb79d4041ee1c6485dac19d5e2830b49cc2f2c8d25d246eb0f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA72572638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4edc4ef2e1d70a2879ee5eb4aa2deb0fbd8f3bd4f2939e7af0f15475568de6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72572639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa727fca5be53aec2388ef9b0a234f31b7950858d276a5ffe1f2d4d9b90dc9678. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZDA72572640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fbf0cd54edb9041d1887757a51ae0aaf3e9d0912c4c93a5ff8f170847fa047. 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/QZDA72572641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde7d46fa3843e439c9783e39c8b5b2d5a90d54619e7217d9291660709a42c73. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:51:55Z), 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/QZDA72572642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b35da4013a507620ced9c0cb7a8fc54a0e50f17b465141b3fd4b69abd891da. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA72572644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4740b347206f5b8dca32ed455ef0bd4f45ade20f2c05b41d81464b584cce7838. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72572648.