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 0x2d7ac1695b6f902778fbf9047e4ba552a1fb6ed461191584327630fd4b383b3e. 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/375213c6-90a6-4aa8-9281-410b01822fa1.json and https://artists.proofprofile.net/proofs/artist/375213c6-90a6-4aa8-9281-410b01822fa1.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 0x9c2a4cc6084a03eeb8a1f4bfa8aa4ec094f36a1e1a81ba3245cfbe74580a8ae9. 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/FRX282435759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811a4c26c618fe18aa7399b08f938c7cf395236099d1815ae540ecc327ca3db3. 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/QM6N22480449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed5523c3a607b836977be1a81d74f5ae41e771795374037c5d82678b4157b8. 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/QM6N22480450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ccd1c4b4d639be6a6e7001acfa757917cf3e75ad4d2ace988e89f66e5ce9b3. 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/CHF032408494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950553e7dc02a44e6607c9d284b3cc5ad550e4597a64b65a8671ba3d05949523. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CHF032408495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe27a807e1e05d26f86ad2bef9240b0e12ec3e06454a4fdb536c4e09cb7c59a3. 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/FR2X42508518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1ea3d9134c63865879921a17f1fbb19b336cd01882a76f79c3c7b2b16b5970. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CHF032420673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d9d7789596cba1e8c9094224f07b83b73fe729fb5e89dfc1c76d74f1f54216. 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/CHF032420674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66493ba5d1a58f518e0d5d0c4a19bc625818df4ac1b391af4506c632962dcf3. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CHF032420676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e743725dd6422e3cf675c3aa82e20c8f73605e38a9a46c8a7809e60ac3c833. 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/CHF032420677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a2f0d769ce6ca58d2645d500876d0fe798420834a515f187348d2a4018821d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CHF032420678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3000ef5c5214c1e8b6bf2a12f3a4ab4ac81a9867e3deef79bd7f55d683456635. 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/CHF032420679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97164013cdc0e7974d890f41c1307c32c703fc227a7f2a7408e171cccc963cc9. 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/CHF032420680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb844c9169f4738b4ea12e6ce2a3e81e9219f36fd52175de7b34e06940d7ee. 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/CHF032420681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d27f58ce0ac12938fe7ba6a5770286e551695b1a204eb5c1ae39bb60ea3eb67. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CHF032420682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6238b5b312b6dcccd72e4c3b3bd585de8ecad982c2469e101ba28df72aff2f. 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/CHF032420683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2966d65feb5d5650e366a1130b6277c4963346cef4473a2bcab444d0af6ce8. 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/CHF032420684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3341f429e2aa7d257cd4d80677f639f18078390ef6923bf90abd397cff6b421. 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/CHF032420685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50ef8e802e42e63a7e945a2f470d500efed2ef9cbff424706820980b6cf694f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062392236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1888fa8d2936211deaadbeed866a3ba7916c429998f9daf3af9bd93c0f1d2cc6. 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/FRX762312608.