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 0x026dbcf5669855ae560eac7ab849b4e8c40ce7a00cb34444007a31aaf7738427. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e91c515c-e0d1-49ca-af62-68e9e25ab684.json and https://artists.proofprofile.net/proofs/artist/e91c515c-e0d1-49ca-af62-68e9e25ab684.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 0x8807b45161551c7330bdff5df7b933dcb11c245fefa779f483e873ba50780ba9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32473794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8081eae5e55be67c54f8709230d51c3959b2b365c5b0e07ba62de998f7725b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM82475766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1924b798e8d159e90c9658e2cb09aebff2d58b8e2953f161fb3390cb6f9044cd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPJ32480368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7eadb8129088b3a1b0bb1b647fe9cdc1612f3baa1b4a7423ed988076f27427. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPJ32480369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2994de538f1afd28bbed5f4aabd360edf84ef7062f089de8df24fb58c39547f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZPJ32480370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a8af0d44fe032fe44558d8654574dbe9bf22d073c23a5cd6c952ef8cee2987. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32480371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4634f3c2fa1e6c9b799320ddce08342ef495cdd3abf0b0b6d230fc770ea33f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPJ32480372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e1106801618456bcd0d986d10c4c3dc2247b4e1c82f0163057b2d67ed7a5e1. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPJ32480373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254addf958081afd851d5dfea72c4e1aeb4fbabd17cc0a136e0a665b9548f737. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPJ32480374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8913b7f214ef9c2fca48c559c719553b736710069e87c5e180c63e4088790b57. 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/QZPJ32480375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d01acff8b60c7b5420afeaf0ff5697fb327362d79cf995770c80a2cd8c6744. 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/QZPJ32480376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21eabeed8833dcf2e30d4d9718cacdc24fdf1a0add0ce451d777adb30c02acb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPJ32480377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e006973293390fe7c948f26c224ac3e31bc2ed4b50d975c95cf888f321d618. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZPJ32480378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edb3184d11a142ced7899020eddc1aa70ade8ece65f1387d31e2f4d316b761f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPJ32480379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d85e801823aa3353b50f9f6e6e48b4e9fe6e60e78ba30537e840fb5811dac. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZPJ32480380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36722d34cc178ec94189991a024f6e735ded45e03e832d209c1fe1d8faaf279. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPJ32480381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8807b45161551c7330bdff5df7b933dcb11c245fefa779f483e873ba50780ba9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZPJ32473794.
Aquatic Ambiance (From "Donkey Kong Country")