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 0x0eda278b7a6a87d7cb969bf60072bb46ad089e01f85cc0f41a65c31d49f21ba6. 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/0ef87674-eab8-4716-a1ad-15fab5ea7c98.json and https://artists.proofprofile.net/proofs/artist/0ef87674-eab8-4716-a1ad-15fab5ea7c98.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 0xb2d4919ad4a2f7b2ab3227b7a3194335d1f2af0f6fe4b3998d6f70cc81b5d598. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMYUZ1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b8baf83e8694b850c35fb73c013c2404118e519971c2371d10a73f370b492a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMYUZ1300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54283462717a6124b31f86b3ccf5838fff0b5af68586551417f62a0bf58f30ff. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QMYUZ1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908fdf80422f04ce278031f2c4d05836b58148225097ca7ef3eb5aa1e368eca1. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMYUZ1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23275c664c0b6995f076bd95c6b5411b21e1c78c09c6492dfa3c49943b02784a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QMYUZ1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6e355fc5537f3f581a54585778041ed31c4983aa7ede1918a995d5edbd4735. 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/QMYUZ1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5314dbb9c61343b178535978e5b0ef8b237dff2f9ed264e75a9c810d34dd56f0. 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/QMYUZ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a049b84558cd21efc662579d7dace3c63186313f2e76224903e22fc2da1ac51. 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/QMYUZ2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a27d2eec26440d8b6c6d77d5904174e7ae0ac5434d22151e6464c089bcb021. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMYUZ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce7a0c65d1df497049da1cc66e542154c159b015a454ec3554c4f3931faf070. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMYUZ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3742516649090766ca9ca8bcdb536c0118e5b1f6e9c25600ab74b2eacfd209. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QMYUZ2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d7dc915a9547b8a78558514fd3e71c26e80ac49b179709fac83eee0fd26d9d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMYUZ2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e8abd0b9d689b4e46748aa5a347a8bc60a89de05bf2b71fed5a59c10536e05. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIB2467133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551ba99cd0ddb30b7bc63fa90e3e78b73ed16c3ef124b88c60189a5e43719a48. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIB2467013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf4f1e9043004cdf36d1e38c41d051a16c90d7beea8e237d4bbffc090996d4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:36:25Z), 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/TCAJH2578847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcf4f1e9043004cdf36d1e38c41d051a16c90d7beea8e237d4bbffc090996d4. 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/TCAJH2578847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04570f893da292925a042db041a2c861f77f60b899becc1ca13ca8c5fafe78a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJE2503254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74fb80dad2521456589b20fd5a50013c636819b79f712e07416203f2b25b1de. 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/QMYUZ1700013.