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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30188338b8801ae600c389c511bc253a54960140f98aacf8b24d417e8588fb2. 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/b817c9b4-988f-4ca3-b7c3-59d45cfdfdea.json and https://artists.proofprofile.net/proofs/artist/b817c9b4-988f-4ca3-b7c3-59d45cfdfdea.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2637c876f715b284241f2475fc193f5b32e3cba40970e40d7b60b3208c7ad153. 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/QMSAV1102303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867936a38eaa8fcb81c55e5d98198ac9d738627a5bee8bf5770748dcb25d1c1e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QMSAV1102304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ecd7e59ec913429775f650c568ca1d8964946ebbc177ee32eb7dc4071f41ff. 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/QMSAV1102305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2db9fc226344fbe10c4d06381dc32eb4b9ca5e214bfe273da97361fe4dce1e. 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/QMSAV1102306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a6395f8f853ce87617c6a558f72ee0f678392453766daede74441ab3da298d. 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/QMSAV1102308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65b91e8659eba8cccf00e3651751a5a7bc1679ea91d6b37fef26480280eeafa. 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/QMSAV1102310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a25eee744e955c5f966b6bff4cdb6e004f9b86dc51df13e720147e69ba8d0b1. 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/QMSAV1102280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784f71daa8d3eca708a423c3e192f849212541ed1e8601d07b00bea0fb62d26e. 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/QMSAV1102282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7621a544330fb7d8042610e9d1e5e792511b3a53548428c3276e5fd006539e. 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/QMSAV1102287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6ec5c3a4ef594da2850c49d24a84203c8a09348c1d4c03f9223bd06bc17931. 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/QMSAV1102883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042f86a585e6ed66a96bccf167c5427a758df67b6e835e34fad0cc2b8296982e. 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/QMSAV1102390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe602b93a8e1e3bda0f88cc31246dbd6d2c66457a2e1bee116d01f6a74e947b5b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:21:51Z), 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/QMSAV1102391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebe722bfc874a5dbeebf8e1c01081dad3c8c87af3dddb2f3e9987a64c86c043. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMSAV1101955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc628f56f7dcd1bbe73ddce5931487bb73d2e6ab43196db3ee7c999e4855910b. 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/QMSAV1101953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5060579b70d89d89a0db10e48af0d45d3985e5111927b85ffddb2408f56d5. 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/QMSAV1101772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc2b35281b60fb40c80112e761b90d449e95ffad75e65cd5f5b4008dddd445d. 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/QMSAV1102269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460610a883b4969c07b10ca1986143f125dfa827a42b17c20369c2b2b07ade82. 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/QMSAV1102536.