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 0x795168d98841e2c1fa5ecccc731e9a3ea14180a69b0b668cd779f4bdbe6257ef. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71cc030f-d500-4843-80f0-41efc60f985c.json and https://artists.proofprofile.net/proofs/artist/71cc030f-d500-4843-80f0-41efc60f985c.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 0xeb0edffe329f6a3ef0e4c190049475106681db3f731c36d675b158b6e138b85a. 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/SE5BW0501103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b162bf403b26bb20fe4cc7c0947ff878b2f12ba6b9885a15ae3953d40b26bf. 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/SE5BW0501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e1d993c38c8073673c0f4d10793507e944fecbd10ee235ca47d38949eb5a56. 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/SE5BW0501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89e27d9ff55f79d40167895ba812db584340a3c9148df1efdf8f36edf0c016e. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SE5BW0501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b03c07d3fc77223f5829c128fd0f97bd6cdc85b3aa628b0cefae0c7bb57dad3. 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/SE5BW0501114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae8ce28befaa67119ecea678f4ee1b29cc56fd5440079384306c67e437d3e21. 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/SE5BW0501116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf474d6262c403df396036a0cccf425a6e0ca6fe348ff016804ff51018b3760e2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SE5BW0501127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595bc9d89273d49ddb6faebc3c3bb82b869fe1b4c3699dd240c37742785411f3. 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/SE5BW0501130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dc57625349426c0ee080e4a4ffe344ff45bab792f34d2f0059ec3f92a08981. 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/SE5BW0501131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1660e6cd7bc9b0a767484925f9142f2cb288864d34469d1970f72ae0343e2869. 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/SE5BW0501136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce599f4252e8dc79b31228ed33ea74f66271b7c2bb496b8b2fb560efd76daef. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE5BW0501101.
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 0x68a3d5f2d78d89fa57d41cd97e1c3b1140bb4b237ec1ecfc5ca3c154c67a6af0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SE5BW0501102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4904e9f059d5e0fb8bf7fa6092d7334f6a52b180b7683cbf992d84becade756d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5BW0501104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af97e0904a4a948522f1b8a5aa20a25d7483ef0ac0497a2866dd92889f2c476. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE5BW0501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de7a5b051d9c4384c06d66e7f7a4515f2330c848243271af3c99e544ca77f26. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SE5BW0501107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038aa405fa05e608373cdf97bcf0fe93d1f1fb32719db359ed960c4f52a2bd40. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5BW0501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551d09cbd85cd7583f5c300a7ab1a05856cc2f61ac4af58abcf71074de0a2fd0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/SE5BW0501111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd4711048ea9886527d70e4f1e40d3f8b692d04eac921b1e99ff8d8fcf99813. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE5BW0501113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85540b7b6922769d0694ee02e372394897aa13f27b0e7fa5db923f95d0d01a5e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE5BW0501115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128bf5d148f20c8026bb28a980edb9ace11dabda329d4c9392d6c4fd5c9d321. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE5BW0501117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f79f1e794cd57d805af7471d7c1cf14dc95af134b75bb666bae06aae738df15. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE5BW0501119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf323592f2d8290a5b36fbf5a231f92ea2cfcabd07f20f1d91c89d1cedba63d6c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5BW0501120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f2c79d85280e7b05a84e9557e4c8f81c154a906c579081c970627404b54938. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/SE5BW0501121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371a852d406cd8e48bfb95b6fcde909282b605a6d0da5aced1a62c5aaa54a08f. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/SE5BW0501122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67314925c9e4fbbb79c9057f6c655acc03f3a281c8424a97305bb0abacb0d20a. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE5BW0501123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc924d7554350861961080b1bcbffee5252e9800790947e10ebb4922629766cc. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5BW0501124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842ecbb9481da38463fc31a44f094f8f8393de0fe24d93f4bee362d885e56f05. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/SE5BW0501128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa462774b9b2e40de73179f643c7633da043dcc50503f746ba64f027181a1bf08. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SE5BW0501129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09519ab20901ea2640ec5a3ed67d3299448d4e3846568a09887e9e095f328500. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5BW0501134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f9b010a20dd761d76537015634c5ca43aee14d95b8ba514a15144f63fa5688. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BW0501137.