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 0xd5add92c9168c3a3cdf7c453a730408985f00328f3076801adc1290c8f991598. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d87eb54b-aca3-409a-bebb-d986f5ac4b23.json and https://artists.proofprofile.net/proofs/artist/d87eb54b-aca3-409a-bebb-d986f5ac4b23.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 0x0e2bb891ab4287bdf0a6676d55c5f166495aa7f71274af6fe04eaa51e85a99cb. 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/FRS182168019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d71696cbe54ace541ec024ffeda9c9d4b8b6e5c9c1b4a009e9201bd034fe533. 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/QZQAY2322278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59389970e5f76625192d95ad655cd8d6a5dcb5212174cfe343ecf324c4662a. 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/FRX452232909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f95f50d22f2c272cf92aa502c64077522a81ecdc8bc9288e9ee9d87e7fb093. 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/FRX762387092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e59389970e5f76625192d95ad655cd8d6a5dcb5212174cfe343ecf324c4662a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX452232909.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e4fcb9be5a3a16fbde5fc868c1e9301fc7312266ab648b9ae38bdacf667ca0. 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/HKG732349723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1838c98a6f6c8f7ed6710a3d5e7909e5f9e6d05140db8367517cb544c9c4fe49. 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/HKG732349724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005de31497e03418b6ce8dc45cf5ffb5e7cac05129ddb810a19e425d6784e4fe. 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/HKG732342402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23efaa5e1ffd7091ddfdd7ec4587935fe683f39335250fb66fc70204a6b9daf. 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/HKG732349725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8abeedf21ac3f55022b26b4a3dcdc850b93df55f5449fb4d18fe3c04e2df1b6. 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/HKG732342401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f07265161fe34fca99193f4c1b93c5d6480d0c0f0f3b5bd5873466d78d8e4e. 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/HKG732349726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6820def393fca7407e654ebe4ac3c1e68b7180016dcf639628ea42c281c85c. 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/HKG732342400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d368205c8446ae5b2f825f6aa5c38eeb9b727be057ffdf02cc5d44e2bae5d79. 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/HKG732349727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde12f1a98e442d5d5770a21a6eb85b890e08dbf3771d025af04c143a814c85b6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKG732349729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9967e0e4c7ddc7d38d366dfccd66297a22bd67a294c006dd8aeb84f660241c40. 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/HKG732111268.